631430771 has 2 divisors, whose sum is σ = 631430772. Its totient is φ = 631430770.

The previous prime is 631430747. The next prime is 631430773. The reversal of 631430771 is 177034136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631430771 - 2¹⁸ = 631168627 is a prime.

Together with 631430773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (631430773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315715385 + 315715386.

It is an arithmetic number, because the mean of its divisors is an integer number (315715386).

Almost surely, 2^631430771 is an apocalyptic number.

631430771 is a deficient number, since it is larger than the sum of its proper divisors (1).

631430771 is an equidigital number, since it uses as much as digits as its factorization.

631430771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 631430771 is about 25128.2862726450. The cubic root of 631430771 is about 857.9103634151.

The spelling of 631430771 in words is "six hundred thirty-one million, four hundred thirty thousand, seven hundred seventy-one".