491930253 has 40 divisors (see below), whose sum is σ = 748012320. Its totient is φ = 322146720.

The previous prime is 491930239. The next prime is 491930261. The reversal of 491930253 is 352039194.

It is a happy number.

It is not a de Polignac number, because 491930253 - 2⁵ = 491930221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491930213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1828603 + ... + 1828871.

It is an arithmetic number, because the mean of its divisors is an integer number (18700308).

Almost surely, 2^491930253 is an apocalyptic number.

It is an amenable number.

491930253 is a deficient number, since it is larger than the sum of its proper divisors (256082067).

491930253 is a wasteful number, since it uses less digits than its factorization.

491930253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 491930253 is about 22179.5007382944. The cubic root of 491930253 is about 789.4073710638.

The spelling of 491930253 in words is "four hundred ninety-one million, nine hundred thirty thousand, two hundred fifty-three".