864669277 has 2 divisors, whose sum is σ = 864669278. Its totient is φ = 864669276.

The previous prime is 864669269. The next prime is 864669331. The reversal of 864669277 is 772966468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 858548601 + 6120676 = 29301^2 + 2474^2 .

It is a cyclic number.

It is not a de Polignac number, because 864669277 - 2³ = 864669269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864669217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432334638 + 432334639.

It is an arithmetic number, because the mean of its divisors is an integer number (432334639).

Almost surely, 2^864669277 is an apocalyptic number.

It is an amenable number.

864669277 is a deficient number, since it is larger than the sum of its proper divisors (1).

864669277 is an equidigital number, since it uses as much as digits as its factorization.

864669277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 55.

The square root of 864669277 is about 29405.2593425054. The cubic root of 864669277 is about 952.6864961828.

The spelling of 864669277 in words is "eight hundred sixty-four million, six hundred sixty-nine thousand, two hundred seventy-seven".