631258379 has 2 divisors, whose sum is σ = 631258380. Its totient is φ = 631258378.

The previous prime is 631258333. The next prime is 631258393. The reversal of 631258379 is 973852136.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631258379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (631258879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315629189 + 315629190.

It is an arithmetic number, because the mean of its divisors is an integer number (315629190).

Almost surely, 2^631258379 is an apocalyptic number.

631258379 is a deficient number, since it is larger than the sum of its proper divisors (1).

631258379 is an equidigital number, since it uses as much as digits as its factorization.

631258379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 631258379 is about 25124.8558005812. The cubic root of 631258379 is about 857.8322813029.

The spelling of 631258379 in words is "six hundred thirty-one million, two hundred fifty-eight thousand, three hundred seventy-nine".