68989923 has 6 divisors (see below), whose sum is σ = 99652124. Its totient is φ = 45993276.

The previous prime is 68989909. The next prime is 68989951. The reversal of 68989923 is 32998986.

It is not a de Polignac number, because 68989923 - 2⁸ = 68989667 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 68989923.

It is not an unprimeable number, because it can be changed into a prime (68985923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3832765 + ... + 3832782.

Almost surely, 2^68989923 is an apocalyptic number.

68989923 is a deficient number, since it is larger than the sum of its proper divisors (30662201).

68989923 is a wasteful number, since it uses less digits than its factorization.

68989923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7665553 (or 7665550 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 68989923 is about 8306.0172766495. The cubic root of 68989923 is about 410.1366250997.

The spelling of 68989923 in words is "sixty-eight million, nine hundred eighty-nine thousand, nine hundred twenty-three".