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79171493 = 738211321
BaseRepresentation
bin1001011100000…
…00111110100101
312111222022212112
410232000332211
5130231441433
611504530405
71650642452
oct456007645
9174868775
1079171493
1140765795
1222620a05
131353024b
14a72c829
156e3d348
hex4b80fa5

79171493 has 8 divisors (see below), whose sum is σ = 80414616. Its totient is φ = 77932800.

The previous prime is 79171457. The next prime is 79171501. The reversal of 79171493 is 39417197.

It can be written as a sum of positive squares in 4 ways, for example, as 22591009 + 56580484 = 4753^2 + 7522^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79171493 - 26 = 79171429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79171493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79171093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59273 + ... + 60593.

It is an arithmetic number, because the mean of its divisors is an integer number (10051827).

Almost surely, 279171493 is an apocalyptic number.

79171493 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

79171493 is a deficient number, since it is larger than the sum of its proper divisors (1243123).

79171493 is a wasteful number, since it uses less digits than its factorization.

79171493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215.

The product of its digits is 47628, while the sum is 41.

The square root of 79171493 is about 8897.8364224119. The cubic root of 79171493 is about 429.3943031578.

The spelling of 79171493 in words is "seventy-nine million, one hundred seventy-one thousand, four hundred ninety-three".

Divisors: 1 73 821 1321 59933 96433 1084541 79171493