847492947 has 24 divisors (see below), whose sum is σ = 1421977440. Its totient is φ = 476340480.

The previous prime is 847492931. The next prime is 847492963. The reversal of 847492947 is 749294748.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (847492931) and next prime (847492963).

It is not a de Polignac number, because 847492947 - 2⁴ = 847492931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 847492893 and 847492902.

It is not an unprimeable number, because it can be changed into a prime (847492847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106422 + ... + 114107.

It is an arithmetic number, because the mean of its divisors is an integer number (59249060).

Almost surely, 2^847492947 is an apocalyptic number.

847492947 is a deficient number, since it is larger than the sum of its proper divisors (574484493).

847492947 is a wasteful number, since it uses less digits than its factorization.

847492947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220603 (or 220600 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 847492947 is about 29111.7321195425. The cubic root of 847492947 is about 946.3360056707.

The spelling of 847492947 in words is "eight hundred forty-seven million, four hundred ninety-two thousand, nine hundred forty-seven".