633252891 has 16 divisors (see below), whose sum is σ = 870028544. Its totient is φ = 409398624.

The previous prime is 633252887. The next prime is 633252901. The reversal of 633252891 is 198252336.

It is not a de Polignac number, because 633252891 - 2² = 633252887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (633252871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24786 + ... + 43368.

It is an arithmetic number, because the mean of its divisors is an integer number (54376784).

Almost surely, 2^633252891 is an apocalyptic number.

633252891 is a deficient number, since it is larger than the sum of its proper divisors (236775653).

633252891 is a wasteful number, since it uses less digits than its factorization.

633252891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18930.

The product of its digits is 77760, while the sum is 39.

The square root of 633252891 is about 25164.5165063826. The cubic root of 633252891 is about 858.7347949822.

The spelling of 633252891 in words is "six hundred thirty-three million, two hundred fifty-two thousand, eight hundred ninety-one".