68607731 has 8 divisors (see below), whose sum is σ = 70566000. Its totient is φ = 66655008.

The previous prime is 68607701. The next prime is 68607751. The reversal of 68607731 is 13770686.

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 68607731 - 2¹⁸ = 68345587 is a prime.

It is a super-2 number, since 2×68607731² = 9414041505936722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68607701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45020 + ... + 46518.

It is an arithmetic number, because the mean of its divisors is an integer number (8820750).

Almost surely, 2^68607731 is an apocalyptic number.

68607731 is a deficient number, since it is larger than the sum of its proper divisors (1958269).

68607731 is a wasteful number, since it uses less digits than its factorization.

68607731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 68607731 is about 8282.9783894442. The cubic root of 68607731 is about 409.3778607185.

The spelling of 68607731 in words is "sixty-eight million, six hundred seven thousand, seven hundred thirty-one".