631094687 has 2 divisors, whose sum is σ = 631094688. Its totient is φ = 631094686.

The previous prime is 631094663. The next prime is 631094693. The reversal of 631094687 is 786490136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631094687 - 2²⁴ = 614317471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631094657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315547343 + 315547344.

It is an arithmetic number, because the mean of its divisors is an integer number (315547344).

Almost surely, 2^631094687 is an apocalyptic number.

631094687 is a deficient number, since it is larger than the sum of its proper divisors (1).

631094687 is an equidigital number, since it uses as much as digits as its factorization.

631094687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 631094687 is about 25121.5980184382. The cubic root of 631094687 is about 857.7581265533.

The spelling of 631094687 in words is "six hundred thirty-one million, ninety-four thousand, six hundred eighty-seven".