631336087 has 2 divisors, whose sum is σ = 631336088. Its totient is φ = 631336086.

The previous prime is 631336073. The next prime is 631336091. The reversal of 631336087 is 780633136.

631336087 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 a de Polignac number, because none of the positive numbers 2^k-631336087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631336187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315668043 + 315668044.

It is an arithmetic number, because the mean of its divisors is an integer number (315668044).

Almost surely, 2^631336087 is an apocalyptic number.

631336087 is a deficient number, since it is larger than the sum of its proper divisors (1).

631336087 is an equidigital number, since it uses as much as digits as its factorization.

631336087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 631336087 is about 25126.4021897286. The cubic root of 631336087 is about 857.8674796190.

The spelling of 631336087 in words is "six hundred thirty-one million, three hundred thirty-six thousand, eighty-seven".