847425747 has 22 divisors (see below), whose sum is σ = 1318217828. Its totient is φ = 484243284.

The previous prime is 847425737. The next prime is 847425749. The reversal of 847425747 is 747524748.

It is not a de Polignac number, because 847425747 - 2²⁰ = 846377171 is a prime.

It is a Duffinian number.

Its product of digits (1756160) is a multiple of the sum of its prime divisors (10).

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 847425696 and 847425705.

It is not an unprimeable number, because it can be changed into a prime (847425749) 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 21 ways as a sum of consecutive naturals, for example, 121060818 + ... + 121060824.

Almost surely, 2^847425747 is an apocalyptic number.

847425747 is a deficient number, since it is larger than the sum of its proper divisors (470792081).

847425747 is an frugal number, since it uses more digits than its factorization.

847425747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 10 counting only the distinct ones).

The product of its digits is 1756160, while the sum is 48.

The square root of 847425747 is about 29110.5779228101. The cubic root of 847425747 is about 946.3109924987.

Multiplying 847425747 by its sum of digits (48), we get a square (40676435856 = 201684²).

Subtracting from 847425747 its reverse (747524748), we obtain a palindrome (99900999).

The spelling of 847425747 in words is "eight hundred forty-seven million, four hundred twenty-five thousand, seven hundred forty-seven".