491942633 has 16 divisors (see below), whose sum is σ = 607474560. Its totient is φ = 387939456.

The previous prime is 491942629. The next prime is 491942663. The reversal of 491942633 is 336249194.

It is a cyclic number.

It is not a de Polignac number, because 491942633 - 2² = 491942629 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (491942663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19133 + ... + 36741.

It is an arithmetic number, because the mean of its divisors is an integer number (37967160).

Almost surely, 2^491942633 is an apocalyptic number.

It is an amenable number.

491942633 is a deficient number, since it is larger than the sum of its proper divisors (115531927).

491942633 is a wasteful number, since it uses less digits than its factorization.

491942633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17936.

The product of its digits is 139968, while the sum is 41.

The square root of 491942633 is about 22179.7798230731. The cubic root of 491942633 is about 789.4139931280.

The spelling of 491942633 in words is "four hundred ninety-one million, nine hundred forty-two thousand, six hundred thirty-three".