631312577 has 8 divisors (see below), whose sum is σ = 726767616. Its totient is φ = 537174432.

The previous prime is 631312573. The next prime is 631312597. The reversal of 631312577 is 775213136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631312577 - 2² = 631312573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631312573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328193 + ... + 330110.

It is an arithmetic number, because the mean of its divisors is an integer number (90845952).

Almost surely, 2^631312577 is an apocalyptic number.

It is an amenable number.

631312577 is a deficient number, since it is larger than the sum of its proper divisors (95455039).

631312577 is a wasteful number, since it uses less digits than its factorization.

631312577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658447.

The product of its digits is 26460, while the sum is 35.

The square root of 631312577 is about 25125.9343507858. The cubic root of 631312577 is about 857.8568309248.

The spelling of 631312577 in words is "six hundred thirty-one million, three hundred twelve thousand, five hundred seventy-seven".