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74207971 = 4712231291
BaseRepresentation
bin1000110110001…
…01001011100011
312011122011012101
410123011023203
5122444123341
611210311231
71560520525
oct433051343
9164564171
1074207971
1138985602
1220a28517
13124b2c56
149bd9a15
1567ac831
hex46c52e3

74207971 has 8 divisors (see below), whose sum is σ = 75907584. Its totient is φ = 72513480.

The previous prime is 74207849. The next prime is 74207989. The reversal of 74207971 is 17970247.

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

It is not a de Polignac number, because 74207971 - 27 = 74207843 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 74207971.

It is not an unprimeable number, because it can be changed into a prime (74207671) 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, 56836 + ... + 58126.

It is an arithmetic number, because the mean of its divisors is an integer number (9488448).

Almost surely, 274207971 is an apocalyptic number.

74207971 is a deficient number, since it is larger than the sum of its proper divisors (1699613).

74207971 is a wasteful number, since it uses less digits than its factorization.

74207971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 74207971 is about 8614.4048546606. The cubic root of 74207971 is about 420.2265803131.

The spelling of 74207971 in words is "seventy-four million, two hundred seven thousand, nine hundred seventy-one".

Divisors: 1 47 1223 1291 57481 60677 1578893 74207971