86979923 has 2 divisors, whose sum is σ = 86979924. Its totient is φ = 86979922.

The previous prime is 86979917. The next prime is 86979953. The reversal of 86979923 is 32997968.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86979923 - 2¹² = 86975827 is a prime.

It is not a weakly prime, because it can be changed into another prime (86979913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43489961 + 43489962.

It is an arithmetic number, because the mean of its divisors is an integer number (43489962).

Almost surely, 2^86979923 is an apocalyptic number.

86979923 is a deficient number, since it is larger than the sum of its proper divisors (1).

86979923 is an equidigital number, since it uses as much as digits as its factorization.

86979923 is an odious number, because the sum of its binary digits is odd.

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

The square root of 86979923 is about 9326.3027508225. The cubic root of 86979923 is about 443.0706744348.

The spelling of 86979923 in words is "eighty-six million, nine hundred seventy-nine thousand, nine hundred twenty-three".