631472342687 has 2 divisors, whose sum is σ = 631472342688. Its totient is φ = 631472342686.

The previous prime is 631472342651. The next prime is 631472342779. The reversal of 631472342687 is 786243274136.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631472342687 - 2¹⁰ = 631472341663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631472942687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315736171343 + 315736171344.

It is an arithmetic number, because the mean of its divisors is an integer number (315736171344).

Almost surely, 2^631472342687 is an apocalyptic number.

631472342687 is a deficient number, since it is larger than the sum of its proper divisors (1).

631472342687 is an equidigital number, since it uses as much as digits as its factorization.

631472342687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 53.

The spelling of 631472342687 in words is "six hundred thirty-one billion, four hundred seventy-two million, three hundred forty-two thousand, six hundred eighty-seven".