631912843417 has 2 divisors, whose sum is σ = 631912843418. Its totient is φ = 631912843416.

The previous prime is 631912843411. The next prime is 631912843451. The reversal of 631912843417 is 714348219136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 618785183641 + 13127659776 = 786629^2 + 114576^2 .

It is a cyclic number.

It is not a de Polignac number, because 631912843417 - 2²³ = 631904454809 is a prime.

It is not a weakly prime, because it can be changed into another prime (631912843411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315956421708 + 315956421709.

It is an arithmetic number, because the mean of its divisors is an integer number (315956421709).

Almost surely, 2^631912843417 is an apocalyptic number.

It is an amenable number.

631912843417 is a deficient number, since it is larger than the sum of its proper divisors (1).

631912843417 is an equidigital number, since it uses as much as digits as its factorization.

631912843417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The spelling of 631912843417 in words is "six hundred thirty-one billion, nine hundred twelve million, eight hundred forty-three thousand, four hundred seventeen".