631472342779 has 2 divisors, whose sum is σ = 631472342780. Its totient is φ = 631472342778.

The previous prime is 631472342687. The next prime is 631472342791. The reversal of 631472342779 is 977243274136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631472342779 - 2⁷ = 631472342651 is a prime.

It is not a weakly prime, because it can be changed into another prime (631472342279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315736171389 + 315736171390.

It is an arithmetic number, because the mean of its divisors is an integer number (315736171390).

Almost surely, 2^631472342779 is an apocalyptic number.

631472342779 is a deficient number, since it is larger than the sum of its proper divisors (1).

631472342779 is an equidigital number, since it uses as much as digits as its factorization.

631472342779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10668672, while the sum is 55.

The spelling of 631472342779 in words is "six hundred thirty-one billion, four hundred seventy-two million, three hundred forty-two thousand, seven hundred seventy-nine".