831940491 has 8 divisors (see below), whose sum is σ = 1110839184. Its totient is φ = 553834400.

The previous prime is 831940469. The next prime is 831940507. The reversal of 831940491 is 194049138.

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 831940491 - 2²⁷ = 697722763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (831940891) 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, 195696 + ... + 199901.

It is an arithmetic number, because the mean of its divisors is an integer number (138854898).

Almost surely, 2^831940491 is an apocalyptic number.

831940491 is a deficient number, since it is larger than the sum of its proper divisors (278898693).

831940491 is a wasteful number, since it uses less digits than its factorization.

831940491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396301.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 831940491 is about 28843.3786335790. The cubic root of 831940491 is about 940.5114505832.

The spelling of 831940491 in words is "eight hundred thirty-one million, nine hundred forty thousand, four hundred ninety-one".