631323489 has 8 divisors (see below), whose sum is σ = 864515200. Its totient is φ = 409507056.

The previous prime is 631323479. The next prime is 631323493. The reversal of 631323489 is 984323136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 631323489 - 2⁵ = 631323457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631323449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2843689 + ... + 2843910.

It is an arithmetic number, because the mean of its divisors is an integer number (108064400).

Almost surely, 2^631323489 is an apocalyptic number.

It is an amenable number.

631323489 is a deficient number, since it is larger than the sum of its proper divisors (233191711).

631323489 is a wasteful number, since it uses less digits than its factorization.

631323489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5687639.

The product of its digits is 93312, while the sum is 39.

The square root of 631323489 is about 25126.1514960011. The cubic root of 631323489 is about 857.8617734736.

The spelling of 631323489 in words is "six hundred thirty-one million, three hundred twenty-three thousand, four hundred eighty-nine".