86217923 has 4 divisors (see below), whose sum is σ = 94055928. Its totient is φ = 78379920.

The previous prime is 86217919. The next prime is 86217959. The reversal of 86217923 is 32971268.

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 86217923 - 2² = 86217919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86217023) 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, 3918986 + ... + 3919007.

It is an arithmetic number, because the mean of its divisors is an integer number (23513982).

Almost surely, 2^86217923 is an apocalyptic number.

86217923 is a deficient number, since it is larger than the sum of its proper divisors (7838005).

86217923 is a wasteful number, since it uses less digits than its factorization.

86217923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7838004.

The product of its digits is 36288, while the sum is 38.

The square root of 86217923 is about 9285.3606822783. The cubic root of 86217923 is about 441.7730163423.

The spelling of 86217923 in words is "eighty-six million, two hundred seventeen thousand, nine hundred twenty-three".