631056997 has 2 divisors, whose sum is σ = 631056998. Its totient is φ = 631056996.

The previous prime is 631056973. The next prime is 631057033. The reversal of 631056997 is 799650136.

631056997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 473454081 + 157602916 = 21759^2 + 12554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631056997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631056397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315528498 + 315528499.

It is an arithmetic number, because the mean of its divisors is an integer number (315528499).

Almost surely, 2^631056997 is an apocalyptic number.

It is an amenable number.

631056997 is a deficient number, since it is larger than the sum of its proper divisors (1).

631056997 is an equidigital number, since it uses as much as digits as its factorization.

631056997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 631056997 is about 25120.8478559144. The cubic root of 631056997 is about 857.7410506438.

The spelling of 631056997 in words is "six hundred thirty-one million, fifty-six thousand, nine hundred ninety-seven".