491698583 has 4 divisors (see below), whose sum is σ = 491753400. Its totient is φ = 491643768.

The previous prime is 491698579. The next prime is 491698591. The reversal of 491698583 is 385896194.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 491698583 - 2² = 491698579 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491698523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10460 + ... + 33057.

It is an arithmetic number, because the mean of its divisors is an integer number (122938350).

Almost surely, 2^491698583 is an apocalyptic number.

491698583 is a deficient number, since it is larger than the sum of its proper divisors (54817).

491698583 is a wasteful number, since it uses less digits than its factorization.

491698583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54816.

The product of its digits is 1866240, while the sum is 53.

The square root of 491698583 is about 22174.2775079595. The cubic root of 491698583 is about 789.2834302402.

The spelling of 491698583 in words is "four hundred ninety-one million, six hundred ninety-eight thousand, five hundred eighty-three".