869479 has 4 divisors (see below), whose sum is σ = 936376. Its totient is φ = 802584.

The previous prime is 869471. The next prime is 869489. The reversal of 869479 is 974968.

869479 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 is a cyclic number.

It is not a de Polignac number, because 869479 - 2³ = 869471 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 (869471) 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, 33429 + ... + 33454.

It is an arithmetic number, because the mean of its divisors is an integer number (234094).

2⁸⁶⁹⁴⁷⁹ is an apocalyptic number.

869479 is a deficient number, since it is larger than the sum of its proper divisors (66897).

869479 is a wasteful number, since it uses less digits than its factorization.

869479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66896.

The product of its digits is 108864, while the sum is 43.

The square root of 869479 is about 932.4585781685. The cubic root of 869479 is about 95.4449670592. Note that the first 3 decimals are identical.

The spelling of 869479 in words is "eight hundred sixty-nine thousand, four hundred seventy-nine".