631513039 has 2 divisors, whose sum is σ = 631513040. Its totient is φ = 631513038.

The previous prime is 631512953. The next prime is 631513067. The reversal of 631513039 is 930315136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631513039 - 2⁹ = 631512527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 631513039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631510039) 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, 315756519 + 315756520.

It is an arithmetic number, because the mean of its divisors is an integer number (315756520).

Almost surely, 2^631513039 is an apocalyptic number.

631513039 is a deficient number, since it is larger than the sum of its proper divisors (1).

631513039 is an equidigital number, since it uses as much as digits as its factorization.

631513039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 631513039 is about 25129.9231793494. The cubic root of 631513039 is about 857.9476203391.

It can be divided in two parts, 6315130 and 39, that added together give a square (6315169 = 2513²).

The spelling of 631513039 in words is "six hundred thirty-one million, five hundred thirteen thousand, thirty-nine".