79866923 has 4 divisors (see below), whose sum is σ = 80013480. Its totient is φ = 79720368.

The previous prime is 79866883. The next prime is 79866949. The reversal of 79866923 is 32966897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79866923 - 2¹⁰ = 79865899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79866223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72458 + ... + 73551.

It is an arithmetic number, because the mean of its divisors is an integer number (20003370).

Almost surely, 2^79866923 is an apocalyptic number.

79866923 is a deficient number, since it is larger than the sum of its proper divisors (146557).

79866923 is a wasteful number, since it uses less digits than its factorization.

79866923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146556.

The product of its digits is 979776, while the sum is 50.

The square root of 79866923 is about 8936.8295832471. The cubic root of 79866923 is about 430.6478839838.

The spelling of 79866923 in words is "seventy-nine million, eight hundred sixty-six thousand, nine hundred twenty-three".