86722969 has 2 divisors, whose sum is σ = 86722970. Its totient is φ = 86722968.

The previous prime is 86722927. The next prime is 86723017. The reversal of 86722969 is 96922768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54096025 + 32626944 = 7355^2 + 5712^2 .

It is a cyclic number.

It is not a de Polignac number, because 86722969 - 2¹³ = 86714777 is a prime.

It is a super-2 number, since 2×86722969² = 15041746704349922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86722919) 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, 43361484 + 43361485.

It is an arithmetic number, because the mean of its divisors is an integer number (43361485).

Almost surely, 2^86722969 is an apocalyptic number.

It is an amenable number.

86722969 is a deficient number, since it is larger than the sum of its proper divisors (1).

86722969 is an equidigital number, since it uses as much as digits as its factorization.

86722969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 86722969 is about 9312.5167919312. The cubic root of 86722969 is about 442.6339411739.

The spelling of 86722969 in words is "eighty-six million, seven hundred twenty-two thousand, nine hundred sixty-nine".