7864947 has 12 divisors (see below), whose sum is σ = 11517064. Its totient is φ = 5171040.

The previous prime is 7864939. The next prime is 7864949. The reversal of 7864947 is 7494687.

It is not a de Polignac number, because 7864947 - 2³ = 7864939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7864949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5329 + ... + 6642.

Almost surely, 2^7864947 is an apocalyptic number.

7864947 is a deficient number, since it is larger than the sum of its proper divisors (3652117).

7864947 is a wasteful number, since it uses less digits than its factorization.

7864947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12050 (or 12047 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 7864947 is about 2804.4512832281. The cubic root of 7864947 is about 198.8681651657.

It can be divided in two parts, 78 and 64947, that added together give a square (65025 = 255²).

The spelling of 7864947 in words is "seven million, eight hundred sixty-four thousand, nine hundred forty-seven".