847484749 has 4 divisors (see below), whose sum is σ = 884331936. Its totient is φ = 810637564.

The previous prime is 847484723. The next prime is 847484779. The reversal of 847484749 is 947484748.

847484749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 847484749 - 2⁷ = 847484621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 847484749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847484779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18423559 + ... + 18423604.

It is an arithmetic number, because the mean of its divisors is an integer number (221082984).

Almost surely, 2^847484749 is an apocalyptic number.

It is an amenable number.

847484749 is a deficient number, since it is larger than the sum of its proper divisors (36847187).

847484749 is a wasteful number, since it uses less digits than its factorization.

847484749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36847186.

The product of its digits is 7225344, while the sum is 55.

The square root of 847484749 is about 29111.5913168621. The cubic root of 847484749 is about 946.3329542834.

Subtracting 847484749 from its reverse (947484748), we obtain a palindrome (99999999).

The spelling of 847484749 in words is "eight hundred forty-seven million, four hundred eighty-four thousand, seven hundred forty-nine".