847272731 has 16 divisors (see below), whose sum is σ = 893349600. Its totient is φ = 803132064.

The previous prime is 847272703. The next prime is 847272743. The reversal of 847272731 is 137272748.

It is a de Polignac number, because none of the positive numbers 2^k-847272731 is a prime.

It is a super-2 number, since 2×847272731² = 1435742161392396722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (847272031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2177885 + ... + 2178273.

It is an arithmetic number, because the mean of its divisors is an integer number (55834350).

Almost surely, 2^847272731 is an apocalyptic number.

847272731 is a deficient number, since it is larger than the sum of its proper divisors (46076869).

847272731 is an frugal number, since it uses more digits than its factorization.

847272731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 469 counting only the distinct ones).

The product of its digits is 131712, while the sum is 41.

The square root of 847272731 is about 29107.9496186179. The cubic root of 847272731 is about 946.2540319766.

The spelling of 847272731 in words is "eight hundred forty-seven million, two hundred seventy-two thousand, seven hundred thirty-one".