491157933 has 16 divisors (see below), whose sum is σ = 751103616. Its totient is φ = 279659520.

The previous prime is 491157913. The next prime is 491157937. The reversal of 491157933 is 339751194.

It is not a de Polignac number, because 491157933 - 2⁸ = 491157677 is a prime.

It is a super-2 number, since 2×491157933² = 482472230297664978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491157937) 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, 35716 + ... + 47517.

It is an arithmetic number, because the mean of its divisors is an integer number (46943976).

Almost surely, 2^491157933 is an apocalyptic number.

It is an amenable number.

491157933 is a deficient number, since it is larger than the sum of its proper divisors (259945683).

491157933 is a wasteful number, since it uses less digits than its factorization.

491157933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83524.

The product of its digits is 102060, while the sum is 42.

The square root of 491157933 is about 22162.0832278917. The cubic root of 491157933 is about 788.9940371039.

The spelling of 491157933 in words is "four hundred ninety-one million, one hundred fifty-seven thousand, nine hundred thirty-three".