847080749 has 4 divisors (see below), whose sum is σ = 876290460. Its totient is φ = 817871040.

The previous prime is 847080737. The next prime is 847080757. The reversal of 847080749 is 947080748.

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

It can be written as a sum of positive squares in 2 ways, for example, as 219928900 + 627151849 = 14830^2 + 25043^2 .

It is a cyclic number.

It is not a de Polignac number, because 847080749 - 2⁴ = 847080733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847080719) 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, 14604812 + ... + 14604869.

It is an arithmetic number, because the mean of its divisors is an integer number (219072615).

Almost surely, 2^847080749 is an apocalyptic number.

It is an amenable number.

847080749 is a deficient number, since it is larger than the sum of its proper divisors (29209711).

847080749 is a wasteful number, since it uses less digits than its factorization.

847080749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29209710.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 847080749 is about 29104.6516728856. The cubic root of 847080749 is about 946.1825565797.

Subtracting 847080749 from its reverse (947080748), we obtain a palindrome (99999999).

The spelling of 847080749 in words is "eight hundred forty-seven million, eighty thousand, seven hundred forty-nine".