68861923 has 12 divisors (see below), whose sum is σ = 74886528. Its totient is φ = 63292320.

The previous prime is 68861911. The next prime is 68861929. The reversal of 68861923 is 32916886.

It is a de Polignac number, because none of the positive numbers 2^k-68861923 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 68861923.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68861929) 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, 46078 + ... + 47548.

It is an arithmetic number, because the mean of its divisors is an integer number (6240544).

Almost surely, 2^68861923 is an apocalyptic number.

68861923 is a deficient number, since it is larger than the sum of its proper divisors (6024605).

68861923 is a wasteful number, since it uses less digits than its factorization.

68861923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774 (or 1761 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 68861923 is about 8298.3084420863. The cubic root of 68861923 is about 409.8828199728.

The spelling of 68861923 in words is "sixty-eight million, eight hundred sixty-one thousand, nine hundred twenty-three".