847489 has 4 divisors (see below), whose sum is σ = 856324. Its totient is φ = 838656.

The previous prime is 847477. The next prime is 847493. The reversal of 847489 is 984748.

847489 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.

It can be written as a sum of positive squares in 2 ways, for example, as 350464 + 497025 = 592^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 847489 - 2⁷ = 847361 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 (847499) 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, 4272 + ... + 4465.

It is an arithmetic number, because the mean of its divisors is an integer number (214081).

2⁸⁴⁷⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

847489 is a deficient number, since it is larger than the sum of its proper divisors (8835).

847489 is an equidigital number, since it uses as much as digits as its factorization.

847489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8834.

The product of its digits is 64512, while the sum is 40.

The square root of 847489 is about 920.5916575768. The cubic root of 847489 is about 94.6334536556.

The spelling of 847489 in words is "eight hundred forty-seven thousand, four hundred eighty-nine".