1323603631 has 24 divisors (see below), whose sum is σ = 1628138880. Its totient is φ = 1069900272.

The previous prime is 1323603539. The next prime is 1323603643. The reversal of 1323603631 is 1363063231.

It is not a de Polignac number, because 1323603631 - 2¹¹ = 1323601583 is a prime.

It is a super-2 number, since 2×1323603631² = 3503853143992768322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1323603631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323609631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 208206 + ... + 214468.

It is an arithmetic number, because the mean of its divisors is an integer number (67839120).

Almost surely, 2^1323603631 is an apocalyptic number.

1323603631 is a deficient number, since it is larger than the sum of its proper divisors (304535249).

1323603631 is a wasteful number, since it uses less digits than its factorization.

1323603631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6523 (or 6516 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 1323603631 is about 36381.3637869720. The cubic root of 1323603631 is about 1097.9586468324.

Adding to 1323603631 its reverse (1363063231), we get a palindrome (2686666862).

The spelling of 1323603631 in words is "one billion, three hundred twenty-three million, six hundred three thousand, six hundred thirty-one".