87392993 has 2 divisors, whose sum is σ = 87392994. Its totient is φ = 87392992.

The previous prime is 87392933. The next prime is 87393013. The reversal of 87392993 is 39929378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82864609 + 4528384 = 9103^2 + 2128^2 .

It is a cyclic number.

It is not a de Polignac number, because 87392993 - 2²⁶ = 20284129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87392923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43696496 + 43696497.

It is an arithmetic number, because the mean of its divisors is an integer number (43696497).

Almost surely, 2^87392993 is an apocalyptic number.

It is an amenable number.

87392993 is a deficient number, since it is larger than the sum of its proper divisors (1).

87392993 is an equidigital number, since it uses as much as digits as its factorization.

87392993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 50.

The square root of 87392993 is about 9348.4219523939. The cubic root of 87392993 is about 443.7709519169.

The spelling of 87392993 in words is "eighty-seven million, three hundred ninety-two thousand, nine hundred ninety-three".