831999961 has 8 divisors (see below), whose sum is σ = 896333760. Its totient is φ = 767713872.

The previous prime is 831999947. The next prime is 831999983. The reversal of 831999961 is 169999138.

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 831999961 - 2⁹ = 831999449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (831997961) 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, 29700 + ... + 50458.

It is an arithmetic number, because the mean of its divisors is an integer number (112041720).

Almost surely, 2^831999961 is an apocalyptic number.

It is an amenable number.

831999961 is a deficient number, since it is larger than the sum of its proper divisors (64333799).

831999961 is a wasteful number, since it uses less digits than its factorization.

831999961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23855.

The product of its digits is 944784, while the sum is 55.

The square root of 831999961 is about 28844.4095276710. The cubic root of 831999961 is about 940.5338603925.

The spelling of 831999961 in words is "eight hundred thirty-one million, nine hundred ninety-nine thousand, nine hundred sixty-one".