491801259 has 8 divisors (see below), whose sum is σ = 656040960. Its totient is φ = 327714536.

The previous prime is 491801251. The next prime is 491801291. The reversal of 491801259 is 952108194.

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 491801259 - 2³ = 491801251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491801251) 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, 30519 + ... + 43760.

It is an arithmetic number, because the mean of its divisors is an integer number (82005120).

Almost surely, 2^491801259 is an apocalyptic number.

491801259 is a deficient number, since it is larger than the sum of its proper divisors (164239701).

491801259 is a wasteful number, since it uses less digits than its factorization.

491801259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76489.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 491801259 is about 22176.5925921905. The cubic root of 491801259 is about 789.3383655387.

The spelling of 491801259 in words is "four hundred ninety-one million, eight hundred one thousand, two hundred fifty-nine".