630601631 has 4 divisors (see below), whose sum is σ = 687929064. Its totient is φ = 573274200.

The previous prime is 630601577. The next prime is 630601691. The reversal of 630601631 is 136106036.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 630601631 - 2⁶ = 630601567 is a prime.

It is a super-2 number, since 2×630601631² = 795316834039720322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 630601631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630601691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28663700 + ... + 28663721.

It is an arithmetic number, because the mean of its divisors is an integer number (171982266).

Almost surely, 2^630601631 is an apocalyptic number.

630601631 is a deficient number, since it is larger than the sum of its proper divisors (57327433).

630601631 is a wasteful number, since it uses less digits than its factorization.

630601631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57327432.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 630601631 is about 25111.7827125037. The cubic root of 630601631 is about 857.5346878277.

Adding to 630601631 its reverse (136106036), we get a palindrome (766707667).

The spelling of 630601631 in words is "six hundred thirty million, six hundred one thousand, six hundred thirty-one".