646297959 has 8 divisors (see below), whose sum is σ = 912420720. Its totient is φ = 405520256.

The previous prime is 646297933. The next prime is 646297961. The reversal of 646297959 is 959792646.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 646297959 - 2⁷ = 646297831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646297899 and 646297908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646297909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6336204 + ... + 6336305.

It is an arithmetic number, because the mean of its divisors is an integer number (114052590).

Almost surely, 2^646297959 is an apocalyptic number.

646297959 is a deficient number, since it is larger than the sum of its proper divisors (266122761).

646297959 is a wasteful number, since it uses less digits than its factorization.

646297959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12672529.

The product of its digits is 7348320, while the sum is 57.

The square root of 646297959 is about 25422.3908985760. The cubic root of 646297959 is about 864.5914334563.

The spelling of 646297959 in words is "six hundred forty-six million, two hundred ninety-seven thousand, nine hundred fifty-nine".