491263937 has 8 divisors (see below), whose sum is σ = 496329600. Its totient is φ = 486224640.

The previous prime is 491263931. The next prime is 491263951. The reversal of 491263937 is 739362194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491263937 - 2⁶ = 491263873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491263931) 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 7 ways as a sum of consecutive naturals, for example, 32012 + ... + 44802.

It is an arithmetic number, because the mean of its divisors is an integer number (62041200).

Almost surely, 2^491263937 is an apocalyptic number.

It is an amenable number.

491263937 is a deficient number, since it is larger than the sum of its proper divisors (5065663).

491263937 is a wasteful number, since it uses less digits than its factorization.

491263937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13183.

The product of its digits is 244944, while the sum is 44.

The square root of 491263937 is about 22164.4746610426. The cubic root of 491263937 is about 789.0507944807.

The spelling of 491263937 in words is "four hundred ninety-one million, two hundred sixty-three thousand, nine hundred thirty-seven".