631320601 has 4 divisors (see below), whose sum is σ = 631452672. Its totient is φ = 631188532.

The previous prime is 631320593. The next prime is 631320607. The reversal of 631320601 is 106023136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 631320601 - 2³ = 631320593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631320607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58585 + ... + 68518.

It is an arithmetic number, because the mean of its divisors is an integer number (157863168).

Almost surely, 2^631320601 is an apocalyptic number.

It is an amenable number.

631320601 is a deficient number, since it is larger than the sum of its proper divisors (132071).

631320601 is a wasteful number, since it uses less digits than its factorization.

631320601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132070.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 631320601 is about 25126.0940259325. The cubic root of 631320601 is about 857.8604653706.

Adding to 631320601 its reverse (106023136), we get a palindrome (737343737).

The spelling of 631320601 in words is "six hundred thirty-one million, three hundred twenty thousand, six hundred one".