68904563 has 16 divisors (see below), whose sum is σ = 86202816. Its totient is φ = 53619840.

The previous prime is 68904529. The next prime is 68904571. The reversal of 68904563 is 36540986.

It is a cyclic number.

It is not a de Polignac number, because 68904563 - 2⁶ = 68904499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68904563.

It is not an unprimeable number, because it can be changed into a prime (68904503) 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, 656 + ... + 11757.

It is an arithmetic number, because the mean of its divisors is an integer number (5387676).

Almost surely, 2^68904563 is an apocalyptic number.

68904563 is a deficient number, since it is larger than the sum of its proper divisors (17298253).

68904563 is a wasteful number, since it uses less digits than its factorization.

68904563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12494.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 68904563 is about 8300.8772427979. The cubic root of 68904563 is about 409.9674037143.

The spelling of 68904563 in words is "sixty-eight million, nine hundred four thousand, five hundred sixty-three".