85972404589 has 2 divisors, whose sum is σ = 85972404590. Its totient is φ = 85972404588.

The previous prime is 85972404533. The next prime is 85972404593. The reversal of 85972404589 is 98540427958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71426838564 + 14545566025 = 267258^2 + 120605^2 .

It is a cyclic number.

It is not a de Polignac number, because 85972404589 - 2⁷ = 85972404461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85972444589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42986202294 + 42986202295.

It is an arithmetic number, because the mean of its divisors is an integer number (42986202295).

Almost surely, 2^85972404589 is an apocalyptic number.

It is an amenable number.

85972404589 is a deficient number, since it is larger than the sum of its proper divisors (1).

85972404589 is an equidigital number, since it uses as much as digits as its factorization.

85972404589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29030400, while the sum is 61.

The spelling of 85972404589 in words is "eighty-five billion, nine hundred seventy-two million, four hundred four thousand, five hundred eighty-nine".