847799249 has 4 divisors (see below), whose sum is σ = 924871920. Its totient is φ = 770726580.

The previous prime is 847799243. The next prime is 847799257. The reversal of 847799249 is 942997748.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 847799249 - 2²⁸ = 579363793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (847799243) 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 3 ways as a sum of consecutive naturals, for example, 38536319 + ... + 38536340.

It is an arithmetic number, because the mean of its divisors is an integer number (231217980).

Almost surely, 2^847799249 is an apocalyptic number.

It is an amenable number.

847799249 is a deficient number, since it is larger than the sum of its proper divisors (77072671).

847799249 is a wasteful number, since it uses less digits than its factorization.

847799249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77072670.

The product of its digits is 9144576, while the sum is 59.

The square root of 847799249 is about 29116.9924442756. The cubic root of 847799249 is about 946.4500006006.

The spelling of 847799249 in words is "eight hundred forty-seven million, seven hundred ninety-nine thousand, two hundred forty-nine".