86977854437 has 2 divisors, whose sum is σ = 86977854438. Its totient is φ = 86977854436.

The previous prime is 86977854433. The next prime is 86977854449. The reversal of 86977854437 is 73445877968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80864021956 + 6113832481 = 284366^2 + 78191^2 .

It is a cyclic number.

It is not a de Polignac number, because 86977854437 - 2² = 86977854433 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86977854433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43488927218 + 43488927219.

It is an arithmetic number, because the mean of its divisors is an integer number (43488927219).

Almost surely, 2^86977854437 is an apocalyptic number.

It is an amenable number.

86977854437 is a deficient number, since it is larger than the sum of its proper divisors (1).

86977854437 is an equidigital number, since it uses as much as digits as its factorization.

86977854437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 284497920, while the sum is 68.

The spelling of 86977854437 in words is "eighty-six billion, nine hundred seventy-seven million, eight hundred fifty-four thousand, four hundred thirty-seven".