646369907 has 2 divisors, whose sum is σ = 646369908. Its totient is φ = 646369906.

The previous prime is 646369861. The next prime is 646369939. The reversal of 646369907 is 709963646.

646369907 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 not a de Polignac number, because 646369907 - 2⁸ = 646369651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (646369007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323184953 + 323184954.

It is an arithmetic number, because the mean of its divisors is an integer number (323184954).

Almost surely, 2^646369907 is an apocalyptic number.

646369907 is a deficient number, since it is larger than the sum of its proper divisors (1).

646369907 is an equidigital number, since it uses as much as digits as its factorization.

646369907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 50.

The square root of 646369907 is about 25423.8059109961. The cubic root of 646369907 is about 864.6235153134.

The spelling of 646369907 in words is "six hundred forty-six million, three hundred sixty-nine thousand, nine hundred seven".