631577 has 2 divisors, whose sum is σ = 631578. Its totient is φ = 631576.

The previous prime is 631573. The next prime is 631583. The reversal of 631577 is 775136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341056 + 290521 = 584^2 + 539^2 .

It is a cyclic number.

It is not a de Polignac number, because 631577 - 2² = 631573 is a prime.

It is not a weakly prime, because it can be changed into another prime (631573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315788 + 315789.

It is an arithmetic number, because the mean of its divisors is an integer number (315789).

2⁶³¹⁵⁷⁷ is an apocalyptic number.

It is an amenable number.

631577 is a deficient number, since it is larger than the sum of its proper divisors (1).

631577 is an equidigital number, since it uses as much as digits as its factorization.

631577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4410, while the sum is 29.

The square root of 631577 is about 794.7181890457. The cubic root of 631577 is about 85.7976584289.

The spelling of 631577 in words is "six hundred thirty-one thousand, five hundred seventy-seven".