831478867 has 4 divisors (see below), whose sum is σ = 831837600. Its totient is φ = 831120136.

The previous prime is 831478847. The next prime is 831478873. The reversal of 831478867 is 768874138.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768874138 = 2 ⋅384437069.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-831478867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (831478847) 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, 175867 + ... + 180532.

It is an arithmetic number, because the mean of its divisors is an integer number (207959400).

Almost surely, 2^831478867 is an apocalyptic number.

831478867 is a deficient number, since it is larger than the sum of its proper divisors (358733).

831478867 is a wasteful number, since it uses less digits than its factorization.

831478867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358732.

The product of its digits is 1806336, while the sum is 52.

The square root of 831478867 is about 28835.3752706636. The cubic root of 831478867 is about 940.3374625838.

The spelling of 831478867 in words is "eight hundred thirty-one million, four hundred seventy-eight thousand, eight hundred sixty-seven".