646298087 has 2 divisors, whose sum is σ = 646298088. Its totient is φ = 646298086.

The previous prime is 646298077. The next prime is 646298113. The reversal of 646298087 is 780892646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646298087 - 2⁸ = 646297831 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646298017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323149043 + 323149044.

It is an arithmetic number, because the mean of its divisors is an integer number (323149044).

Almost surely, 2^646298087 is an apocalyptic number.

646298087 is a deficient number, since it is larger than the sum of its proper divisors (1).

646298087 is an equidigital number, since it uses as much as digits as its factorization.

646298087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 646298087 is about 25422.3934160417. The cubic root of 646298087 is about 864.5914905341.

The spelling of 646298087 in words is "six hundred forty-six million, two hundred ninety-eight thousand, eighty-seven".