68520887 has 16 divisors (see below), whose sum is σ = 74173440. Its totient is φ = 63135072.

The previous prime is 68520883. The next prime is 68520901. The reversal of 68520887 is 78802586.

It is a cyclic number.

It is not a de Polignac number, because 68520887 - 2² = 68520883 is a prime.

It is a super-2 number, since 2×68520887² = 9390223910533538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68520883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77693 + ... + 78569.

It is an arithmetic number, because the mean of its divisors is an integer number (4635840).

Almost surely, 2^68520887 is an apocalyptic number.

68520887 is a deficient number, since it is larger than the sum of its proper divisors (5652553).

68520887 is a wasteful number, since it uses less digits than its factorization.

68520887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022.

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 68520887 is about 8277.7344122652. The cubic root of 68520887 is about 409.2050569562.

The spelling of 68520887 in words is "sixty-eight million, five hundred twenty thousand, eight hundred eighty-seven".