631396801 has 16 divisors (see below), whose sum is σ = 737712000. Its totient is φ = 540176784.

The previous prime is 631396793. The next prime is 631396807. The reversal of 631396801 is 108693136.

It is not a de Polignac number, because 631396801 - 2³ = 631396793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631396807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222570 + ... + 225388.

It is an arithmetic number, because the mean of its divisors is an integer number (46107000).

Almost surely, 2^631396801 is an apocalyptic number.

It is an amenable number.

631396801 is a deficient number, since it is larger than the sum of its proper divisors (106315199).

631396801 is an equidigital number, since it uses as much as digits as its factorization.

631396801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493 (or 3479 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 631396801 is about 25127.6103320630. The cubic root of 631396801 is about 857.8949783885.

The spelling of 631396801 in words is "six hundred thirty-one million, three hundred ninety-six thousand, eight hundred one".