864460889 has 2 divisors, whose sum is σ = 864460890. Its totient is φ = 864460888.

The previous prime is 864460847. The next prime is 864460907. The reversal of 864460889 is 988064468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608460889 + 256000000 = 24667^2 + 16000^2 .

It is a cyclic number.

It is not a de Polignac number, because 864460889 - 2⁸ = 864460633 is a prime.

It is a super-2 number, since 2×864460889² = 1494585257221340642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 864460889.

It is not a weakly prime, because it can be changed into another prime (864490889) 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, 432230444 + 432230445.

It is an arithmetic number, because the mean of its divisors is an integer number (432230445).

Almost surely, 2^864460889 is an apocalyptic number.

It is an amenable number.

864460889 is a deficient number, since it is larger than the sum of its proper divisors (1).

864460889 is an equidigital number, since it uses as much as digits as its factorization.

864460889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2654208, while the sum is 53.

The square root of 864460889 is about 29401.7157492552. The cubic root of 864460889 is about 952.6099565587.

The spelling of 864460889 in words is "eight hundred sixty-four million, four hundred sixty thousand, eight hundred eighty-nine".