631597 has 2 divisors, whose sum is σ = 631598. Its totient is φ = 631596.

The previous prime is 631583. The next prime is 631613. The reversal of 631597 is 795136.

631597 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., 509796 + 121801 = 714^2 + 349^2 .

It is a cyclic number.

It is not a de Polignac number, because 631597 - 2⁷ = 631469 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315798 + 315799.

It is an arithmetic number, because the mean of its divisors is an integer number (315799).

2⁶³¹⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

631597 is a deficient number, since it is larger than the sum of its proper divisors (1).

631597 is an equidigital number, since it uses as much as digits as its factorization.

631597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 31.

The square root of 631597 is about 794.7307720228. The cubic root of 631597 is about 85.7985640640.

The spelling of 631597 in words is "six hundred thirty-one thousand, five hundred ninety-seven".