631684876087 has 2 divisors, whose sum is σ = 631684876088. Its totient is φ = 631684876086.

The previous prime is 631684876033. The next prime is 631684876091. The reversal of 631684876087 is 780678486136.

631684876087 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-631684876087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631684876387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315842438043 + 315842438044.

It is an arithmetic number, because the mean of its divisors is an integer number (315842438044).

Almost surely, 2^631684876087 is an apocalyptic number.

631684876087 is a deficient number, since it is larger than the sum of its proper divisors (1).

631684876087 is an equidigital number, since it uses as much as digits as its factorization.

631684876087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65028096, while the sum is 64.

The spelling of 631684876087 in words is "six hundred thirty-one billion, six hundred eighty-four million, eight hundred seventy-six thousand, eighty-seven".