491607633 has 12 divisors (see below), whose sum is σ = 720483344. Its totient is φ = 297943800.

The previous prime is 491607619. The next prime is 491607637. The reversal of 491607633 is 336706194.

It is not a de Polignac number, because 491607633 - 2¹² = 491603537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491607591 and 491607600.

It is not an unprimeable number, because it can be changed into a prime (491607637) 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, 676783 + ... + 677508.

Almost surely, 2^491607633 is an apocalyptic number.

It is an amenable number.

491607633 is a deficient number, since it is larger than the sum of its proper divisors (228875711).

491607633 is a wasteful number, since it uses less digits than its factorization.

491607633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354316 (or 1354305 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 491607633 is about 22172.2266134910. The cubic root of 491607633 is about 789.2347623795.

The spelling of 491607633 in words is "four hundred ninety-one million, six hundred seven thousand, six hundred thirty-three".