864626459 has 2 divisors, whose sum is σ = 864626460. Its totient is φ = 864626458.

The previous prime is 864626431. The next prime is 864626461. The reversal of 864626459 is 954626468.

864626459 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864626459 is a prime.

Together with 864626461, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (864626479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432313229 + 432313230.

It is an arithmetic number, because the mean of its divisors is an integer number (432313230).

Almost surely, 2^864626459 is an apocalyptic number.

864626459 is a deficient number, since it is larger than the sum of its proper divisors (1).

864626459 is an equidigital number, since it uses as much as digits as its factorization.

864626459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 50.

The square root of 864626459 is about 29404.5312664562. The cubic root of 864626459 is about 952.6707704000.

Subtracting 864626459 from its reverse (954626468), we obtain a palindrome (90000009).

The spelling of 864626459 in words is "eight hundred sixty-four million, six hundred twenty-six thousand, four hundred fifty-nine".