491027491 has 8 divisors (see below), whose sum is σ = 501329024. Its totient is φ = 480798720.

The previous prime is 491027447. The next prime is 491027497. The reversal of 491027491 is 194720194.

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 491027491 - 2²⁷ = 356809763 is a prime.

It is a super-2 number, since 2×491027491² = 482215993835510162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 491027491.

It is not an unprimeable number, because it can be changed into a prime (491027497) 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, 4446 + ... + 31651.

It is an arithmetic number, because the mean of its divisors is an integer number (62666128).

Almost surely, 2^491027491 is an apocalyptic number.

491027491 is a deficient number, since it is larger than the sum of its proper divisors (10301533).

491027491 is a wasteful number, since it uses less digits than its factorization.

491027491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36381.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 491027491 is about 22159.1401232088. The cubic root of 491027491 is about 788.9241837596.

The spelling of 491027491 in words is "four hundred ninety-one million, twenty-seven thousand, four hundred ninety-one".