68406863 has 12 divisors (see below), whose sum is σ = 80790480. Its totient is φ = 56737440.

The previous prime is 68406829. The next prime is 68406869. The reversal of 68406863 is 36860486.

It is not a de Polignac number, because 68406863 - 2⁸ = 68406607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68406863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68406869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1643 + ... + 11811.

It is an arithmetic number, because the mean of its divisors is an integer number (6732540).

Almost surely, 2^68406863 is an apocalyptic number.

68406863 is a deficient number, since it is larger than the sum of its proper divisors (12383617).

68406863 is a wasteful number, since it uses less digits than its factorization.

68406863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10238 (or 10207 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 68406863 is about 8270.8441528057. The cubic root of 68406863 is about 408.9779480900.

The spelling of 68406863 in words is "sixty-eight million, four hundred six thousand, eight hundred sixty-three".