86962721 has 2 divisors, whose sum is σ = 86962722. Its totient is φ = 86962720.

The previous prime is 86962703. The next prime is 86962723. The reversal of 86962721 is 12726968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72063121 + 14899600 = 8489^2 + 3860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86962721 is a prime.

It is a Sophie Germain prime.

Together with 86962723, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (86962723) 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, 43481360 + 43481361.

It is an arithmetic number, because the mean of its divisors is an integer number (43481361).

Almost surely, 2^86962721 is an apocalyptic number.

It is an amenable number.

86962721 is a deficient number, since it is larger than the sum of its proper divisors (1).

86962721 is an equidigital number, since it uses as much as digits as its factorization.

86962721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 86962721 is about 9325.3804748117. The cubic root of 86962721 is about 443.0414638462.

The spelling of 86962721 in words is "eighty-six million, nine hundred sixty-two thousand, seven hundred twenty-one".