323121663 has 16 divisors (see below), whose sum is σ = 488885760. Its totient is φ = 210830328.

The previous prime is 323121653. The next prime is 323121677. The reversal of 323121663 is 366121323.

It is a happy number.

It is not a de Polignac number, because 323121663 - 2⁶ = 323121599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323121653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126045 + ... + 128582.

It is an arithmetic number, because the mean of its divisors is an integer number (30555360).

Almost surely, 2^323121663 is an apocalyptic number.

323121663 is a deficient number, since it is larger than the sum of its proper divisors (165764097).

323121663 is a wasteful number, since it uses less digits than its factorization.

323121663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254683 (or 254677 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 323121663 is about 17975.5851921433. The cubic root of 323121663 is about 686.2073388631.

Adding to 323121663 its reverse (366121323), we get a palindrome (689242986).

The spelling of 323121663 in words is "three hundred twenty-three million, one hundred twenty-one thousand, six hundred sixty-three".