491875679 has 8 divisors (see below), whose sum is σ = 504627312. Its totient is φ = 479286720.

The previous prime is 491875673. The next prime is 491875687. The reversal of 491875679 is 976578194.

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 491875679 - 2²⁸ = 223440223 is a prime.

It is a super-2 number, since 2×491875679² = 483883367183422082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491875673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34532 + ... + 46649.

It is an arithmetic number, because the mean of its divisors is an integer number (63078414).

Almost surely, 2^491875679 is an apocalyptic number.

491875679 is a deficient number, since it is larger than the sum of its proper divisors (12751633).

491875679 is an equidigital number, since it uses as much as digits as its factorization.

491875679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81337.

The product of its digits is 3810240, while the sum is 56.

The square root of 491875679 is about 22178.2704239984. The cubic root of 491875679 is about 789.3781780967.

The spelling of 491875679 in words is "four hundred ninety-one million, eight hundred seventy-five thousand, six hundred seventy-nine".