87564923 has 2 divisors, whose sum is σ = 87564924. Its totient is φ = 87564922.

The previous prime is 87564871. The next prime is 87564941. The reversal of 87564923 is 32946578.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87564923 - 2⁶ = 87564859 is a prime.

It is not a weakly prime, because it can be changed into another prime (87560923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43782461 + 43782462.

It is an arithmetic number, because the mean of its divisors is an integer number (43782462).

Almost surely, 2^87564923 is an apocalyptic number.

87564923 is a deficient number, since it is larger than the sum of its proper divisors (1).

87564923 is an equidigital number, since it uses as much as digits as its factorization.

87564923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 87564923 is about 9357.6131037781. The cubic root of 87564923 is about 444.0617744717.

The spelling of 87564923 in words is "eighty-seven million, five hundred sixty-four thousand, nine hundred twenty-three".