631388142127 has 2 divisors, whose sum is σ = 631388142128. Its totient is φ = 631388142126.

The previous prime is 631388142107. The next prime is 631388142139. The reversal of 631388142127 is 721241883136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631388142127 - 2³⁵ = 597028403759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631388142107) 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, 315694071063 + 315694071064.

It is an arithmetic number, because the mean of its divisors is an integer number (315694071064).

Almost surely, 2^631388142127 is an apocalyptic number.

631388142127 is a deficient number, since it is larger than the sum of its proper divisors (1).

631388142127 is an equidigital number, since it uses as much as digits as its factorization.

631388142127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 46.

The spelling of 631388142127 in words is "six hundred thirty-one billion, three hundred eighty-eight million, one hundred forty-two thousand, one hundred twenty-seven".