631479384047 has 2 divisors, whose sum is σ = 631479384048. Its totient is φ = 631479384046.

The previous prime is 631479383999. The next prime is 631479384101. The reversal of 631479384047 is 740483974136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631479384047 - 2¹⁰ = 631479383023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631479383983 and 631479384001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631479384647) 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, 315739692023 + 315739692024.

It is an arithmetic number, because the mean of its divisors is an integer number (315739692024).

Almost surely, 2^631479384047 is an apocalyptic number.

631479384047 is a deficient number, since it is larger than the sum of its proper divisors (1).

631479384047 is an equidigital number, since it uses as much as digits as its factorization.

631479384047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 56.

The spelling of 631479384047 in words is "six hundred thirty-one billion, four hundred seventy-nine million, three hundred eighty-four thousand, forty-seven".