847974497 has 4 divisors (see below), whose sum is σ = 859590660. Its totient is φ = 836358336.

The previous prime is 847974493. The next prime is 847974499. The reversal of 847974497 is 794479748.

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 502163281 + 345811216 = 22409^2 + 18596^2 .

It is a cyclic number.

It is not a de Polignac number, because 847974497 - 2² = 847974493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (847974493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5807972 + ... + 5808117.

It is an arithmetic number, because the mean of its divisors is an integer number (214897665).

Almost surely, 2^847974497 is an apocalyptic number.

It is an amenable number.

847974497 is a deficient number, since it is larger than the sum of its proper divisors (11616163).

847974497 is a wasteful number, since it uses less digits than its factorization.

847974497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11616162.

The product of its digits is 14224896, while the sum is 59.

The square root of 847974497 is about 29120.0016655219. The cubic root of 847974497 is about 946.5152094507.

The spelling of 847974497 in words is "eight hundred forty-seven million, nine hundred seventy-four thousand, four hundred ninety-seven".