631449313127 has 2 divisors, whose sum is σ = 631449313128. Its totient is φ = 631449313126.

The previous prime is 631449313123. The next prime is 631449313133. The reversal of 631449313127 is 721313944136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631449313127 - 2² = 631449313123 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631449313123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315724656563 + 315724656564.

It is an arithmetic number, because the mean of its divisors is an integer number (315724656564).

Almost surely, 2^631449313127 is an apocalyptic number.

631449313127 is a deficient number, since it is larger than the sum of its proper divisors (1).

631449313127 is an equidigital number, since it uses as much as digits as its factorization.

631449313127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The spelling of 631449313127 in words is "six hundred thirty-one billion, four hundred forty-nine million, three hundred thirteen thousand, one hundred twenty-seven".