78699923 has 8 divisors (see below), whose sum is σ = 80448000. Its totient is φ = 76965768.

The previous prime is 78699911. The next prime is 78699967. The reversal of 78699923 is 32999687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78699923 - 2²² = 74505619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78695923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8390 + ... + 15092.

It is an arithmetic number, because the mean of its divisors is an integer number (10056000).

Almost surely, 2^78699923 is an apocalyptic number.

78699923 is a deficient number, since it is larger than the sum of its proper divisors (1748077).

78699923 is a wasteful number, since it uses less digits than its factorization.

78699923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6961.

The product of its digits is 1469664, while the sum is 53.

The square root of 78699923 is about 8871.2977066492. The cubic root of 78699923 is about 428.5400696050.

The spelling of 78699923 in words is "seventy-eight million, six hundred ninety-nine thousand, nine hundred twenty-three".