68987765 has 32 divisors (see below), whose sum is σ = 108656640. Its totient is φ = 40737600.

The previous prime is 68987749. The next prime is 68987771. The reversal of 68987765 is 56778986.

It is a happy number.

It is not a de Polignac number, because 68987765 - 2⁴ = 68987749 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68987765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2600 + ... + 12030.

It is an arithmetic number, because the mean of its divisors is an integer number (3395520).

Almost surely, 2^68987765 is an apocalyptic number.

It is an amenable number.

68987765 is a deficient number, since it is larger than the sum of its proper divisors (39668875).

68987765 is a wasteful number, since it uses less digits than its factorization.

68987765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9473.

The product of its digits is 5080320, while the sum is 56.

The square root of 68987765 is about 8305.8873698118. The cubic root of 68987765 is about 410.1323487067.

The spelling of 68987765 in words is "sixty-eight million, nine hundred eighty-seven thousand, seven hundred sixty-five".