631665323 has 4 divisors (see below), whose sum is σ = 633072600. Its totient is φ = 630258048.

The previous prime is 631665271. The next prime is 631665337. The reversal of 631665323 is 323566136.

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 631665323 - 2⁶ = 631665259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631665343) 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, 702965 + ... + 703862.

It is an arithmetic number, because the mean of its divisors is an integer number (158268150).

Almost surely, 2^631665323 is an apocalyptic number.

631665323 is a deficient number, since it is larger than the sum of its proper divisors (1407277).

631665323 is a wasteful number, since it uses less digits than its factorization.

631665323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407276.

The product of its digits is 58320, while the sum is 35.

The square root of 631665323 is about 25132.9529303661. The cubic root of 631665323 is about 858.0165770547.

The spelling of 631665323 in words is "six hundred thirty-one million, six hundred sixty-five thousand, three hundred twenty-three".