631454973139 has 2 divisors, whose sum is σ = 631454973140. Its totient is φ = 631454973138.

The previous prime is 631454973113. The next prime is 631454973221. The reversal of 631454973139 is 931379454136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631454973139 - 2¹⁵ = 631454940371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 631454973139.

It is not a weakly prime, because it can be changed into another prime (631454973239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315727486569 + 315727486570.

It is an arithmetic number, because the mean of its divisors is an integer number (315727486570).

Almost surely, 2^631454973139 is an apocalyptic number.

631454973139 is a deficient number, since it is larger than the sum of its proper divisors (1).

631454973139 is an equidigital number, since it uses as much as digits as its factorization.

631454973139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7348320, while the sum is 55.

The spelling of 631454973139 in words is "six hundred thirty-one billion, four hundred fifty-four million, nine hundred seventy-three thousand, one hundred thirty-nine".