646695359 has 2 divisors, whose sum is σ = 646695360. Its totient is φ = 646695358.

The previous prime is 646695353. The next prime is 646695383. The reversal of 646695359 is 953596646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646695359 - 2²⁴ = 629918143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 646695359.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646695353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323347679 + 323347680.

It is an arithmetic number, because the mean of its divisors is an integer number (323347680).

Almost surely, 2^646695359 is an apocalyptic number.

646695359 is a deficient number, since it is larger than the sum of its proper divisors (1).

646695359 is an equidigital number, since it uses as much as digits as its factorization.

646695359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5248800, while the sum is 53.

The square root of 646695359 is about 25430.2056421099. The cubic root of 646695359 is about 864.7686057302.

The spelling of 646695359 in words is "six hundred forty-six million, six hundred ninety-five thousand, three hundred fifty-nine".