847242147 has 4 divisors (see below), whose sum is σ = 1129656200. Its totient is φ = 564828096.

The previous prime is 847242133. The next prime is 847242197. The reversal of 847242147 is 741242748.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 847242147 - 2¹¹ = 847240099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (847242197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141207022 + ... + 141207027.

It is an arithmetic number, because the mean of its divisors is an integer number (282414050).

Almost surely, 2^847242147 is an apocalyptic number.

847242147 is a deficient number, since it is larger than the sum of its proper divisors (282414053).

847242147 is a wasteful number, since it uses less digits than its factorization.

847242147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282414052.

The product of its digits is 100352, while the sum is 39.

The square root of 847242147 is about 29107.4242591130. The cubic root of 847242147 is about 946.2426461971.

The spelling of 847242147 in words is "eight hundred forty-seven million, two hundred forty-two thousand, one hundred forty-seven".