847272749 has 24 divisors (see below), whose sum is σ = 913052160. Its totient is φ = 785232000.

The previous prime is 847272743. The next prime is 847272773. The reversal of 847272749 is 947272748.

It is a de Polignac number, because none of the positive numbers 2^k-847272749 is a prime.

It is a super-2 number, since 2×847272749² = 1435742222396034002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 847272697 and 847272706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847272743) 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 23 ways as a sum of consecutive naturals, for example, 3699767 + ... + 3699995.

It is an arithmetic number, because the mean of its divisors is an integer number (38043840).

Almost surely, 2^847272749 is an apocalyptic number.

It is an amenable number.

847272749 is a deficient number, since it is larger than the sum of its proper divisors (65779411).

847272749 is a wasteful number, since it uses less digits than its factorization.

847272749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 372 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 50.

The square root of 847272749 is about 29107.9499278118. The cubic root of 847272749 is about 946.2540386775.

Subtracting 847272749 from its reverse (947272748), we obtain a palindrome (99999999).

The spelling of 847272749 in words is "eight hundred forty-seven million, two hundred seventy-two thousand, seven hundred forty-nine".