489923631 has 12 divisors (see below), whose sum is σ = 718230552. Its totient is φ = 321740496.

The previous prime is 489923627. The next prime is 489923633. The reversal of 489923631 is 136329984.

It is a happy number.

489923631 is a `hidden beast` number, since 4 + 8 + 9 + 9 + 2 + 3 + 631 = 666.

It is not a de Polignac number, because 489923631 - 2² = 489923627 is a prime.

It is a super-2 number, since 2×489923631² = 480050328424448322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489923633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405636 + ... + 406841.

It is an arithmetic number, because the mean of its divisors is an integer number (59852546).

Almost surely, 2^489923631 is an apocalyptic number.

489923631 is a deficient number, since it is larger than the sum of its proper divisors (228306921).

489923631 is a wasteful number, since it uses less digits than its factorization.

489923631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812550 (or 812547 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 489923631 is about 22134.2185540850. The cubic root of 489923631 is about 788.3325568376.

It can be divided in two parts, 489 and 923631, that added together give a triangular number (924120 = T₁₃₅₉).

The spelling of 489923631 in words is "four hundred eighty-nine million, nine hundred twenty-three thousand, six hundred thirty-one".