864499439 has 2 divisors, whose sum is σ = 864499440. Its totient is φ = 864499438.

The previous prime is 864499429. The next prime is 864499457. The reversal of 864499439 is 934994468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 864499439 - 2⁴ = 864499423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864499429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432249719 + 432249720.

It is an arithmetic number, because the mean of its divisors is an integer number (432249720).

Almost surely, 2^864499439 is an apocalyptic number.

864499439 is a deficient number, since it is larger than the sum of its proper divisors (1).

864499439 is an equidigital number, since it uses as much as digits as its factorization.

864499439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 56.

The square root of 864499439 is about 29402.3713159330. The cubic root of 864499439 is about 952.6241166625.

The spelling of 864499439 in words is "eight hundred sixty-four million, four hundred ninety-nine thousand, four hundred thirty-nine".