86439976453 has 2 divisors, whose sum is σ = 86439976454. Its totient is φ = 86439976452.

The previous prime is 86439976433. The next prime is 86439976487. The reversal of 86439976453 is 35467993468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65847152449 + 20592824004 = 256607^2 + 143502^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86439976453 is a prime.

It is a super-2 number, since 2×86439976453² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86439976433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43219988226 + 43219988227.

It is an arithmetic number, because the mean of its divisors is an integer number (43219988227).

Almost surely, 2^86439976453 is an apocalyptic number.

It is an amenable number.

86439976453 is a deficient number, since it is larger than the sum of its proper divisors (1).

86439976453 is an equidigital number, since it uses as much as digits as its factorization.

86439976453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 64.

The spelling of 86439976453 in words is "eighty-six billion, four hundred thirty-nine million, nine hundred seventy-six thousand, four hundred fifty-three".