847397 has 4 divisors (see below), whose sum is σ = 849420. Its totient is φ = 845376.

The previous prime is 847393. The next prime is 847423. The reversal of 847397 is 793748.

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 256036 + 591361 = 506^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 847397 - 2² = 847393 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 847397.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 847397.

It is not an unprimeable number, because it can be changed into a prime (847393) 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, 122 + ... + 1307.

It is an arithmetic number, because the mean of its divisors is an integer number (212355).

2⁸⁴⁷³⁹⁷ is an apocalyptic number.

It is an amenable number.

847397 is a deficient number, since it is larger than the sum of its proper divisors (2023).

847397 is a wasteful number, since it uses less digits than its factorization.

847397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022.

The product of its digits is 42336, while the sum is 38.

The square root of 847397 is about 920.5416883553. The cubic root of 847397 is about 94.6300291892.

The spelling of 847397 in words is "eight hundred forty-seven thousand, three hundred ninety-seven".