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68712369 = 3112082193
BaseRepresentation
bin1000001100001…
…11011110110001
311210021221122120
410012013132301
5120042243434
610452424453
71463021415
oct406073661
9153257576
1068712369
1135871690
121b018129
131130a70b
1491a8d45
156074349
hex41877b1

68712369 has 8 divisors (see below), whose sum is σ = 99945312. Its totient is φ = 41643840.

The previous prime is 68712353. The next prime is 68712373. The reversal of 68712369 is 96321786.

It is a happy number.

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

It is not a de Polignac number, because 68712369 - 24 = 68712353 is a prime.

It is a super-2 number, since 2×687123692 = 9442779307184322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68712369.

It is not an unprimeable number, because it can be changed into a prime (68712389) 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, 1041064 + ... + 1041129.

It is an arithmetic number, because the mean of its divisors is an integer number (12493164).

Almost surely, 268712369 is an apocalyptic number.

It is an amenable number.

68712369 is a deficient number, since it is larger than the sum of its proper divisors (31232943).

68712369 is a wasteful number, since it uses less digits than its factorization.

68712369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082207.

The product of its digits is 108864, while the sum is 42.

The square root of 68712369 is about 8289.2924305999. The cubic root of 68712369 is about 409.5858777104.

It can be divided in two parts, 687 and 12369, that multiplied together give a triangular number (8497503 = T4122).

The spelling of 68712369 in words is "sixty-eight million, seven hundred twelve thousand, three hundred sixty-nine".

Divisors: 1 3 11 33 2082193 6246579 22904123 68712369