646525007 has 2 divisors, whose sum is σ = 646525008. Its totient is φ = 646525006.

The previous prime is 646524973. The next prime is 646525021. The reversal of 646525007 is 700525646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646525007 - 2⁸ = 646524751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646525037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323262503 + 323262504.

It is an arithmetic number, because the mean of its divisors is an integer number (323262504).

Almost surely, 2^646525007 is an apocalyptic number.

646525007 is a deficient number, since it is larger than the sum of its proper divisors (1).

646525007 is an equidigital number, since it uses as much as digits as its factorization.

646525007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 646525007 is about 25426.8560187845. The cubic root of 646525007 is about 864.6926668323.

The spelling of 646525007 in words is "six hundred forty-six million, five hundred twenty-five thousand, seven".