847649131 has 8 divisors (see below), whose sum is σ = 969884384. Its totient is φ = 725699520.

The previous prime is 847649119. The next prime is 847649137. The reversal of 847649131 is 131946748.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 847649131 - 2¹⁷ = 847518059 is a prime.

It is a super-2 number, since 2×847649131² = 1437018098570110322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (847649137) 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, 65010 + ... + 76951.

It is an arithmetic number, because the mean of its divisors is an integer number (121235548).

Almost surely, 2^847649131 is an apocalyptic number.

847649131 is a deficient number, since it is larger than the sum of its proper divisors (122235253).

847649131 is a wasteful number, since it uses less digits than its factorization.

847649131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142821.

The product of its digits is 145152, while the sum is 43.

The square root of 847649131 is about 29114.4144883595. The cubic root of 847649131 is about 946.3941353439.

The spelling of 847649131 in words is "eight hundred forty-seven million, six hundred forty-nine thousand, one hundred thirty-one".