831942047 has 4 divisors (see below), whose sum is σ = 839304480. Its totient is φ = 824579616.

The previous prime is 831942043. The next prime is 831942079. The reversal of 831942047 is 740249138.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 831942047 - 2² = 831942043 is a prime.

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 831942047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831942043) 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, 3681047 + ... + 3681272.

It is an arithmetic number, because the mean of its divisors is an integer number (209826120).

Almost surely, 2^831942047 is an apocalyptic number.

831942047 is a deficient number, since it is larger than the sum of its proper divisors (7362433).

831942047 is a wasteful number, since it uses less digits than its factorization.

831942047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7362432.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 831942047 is about 28843.4056068281. The cubic root of 831942047 is about 940.5120369372.

The spelling of 831942047 in words is "eight hundred thirty-one million, nine hundred forty-two thousand, forty-seven".