869913 has 32 divisors (see below), whose sum is σ = 1468800. Its totient is φ = 504000.

The previous prime is 869909. The next prime is 869927. The reversal of 869913 is 319968.

It is not a de Polignac number, because 869913 - 2² = 869909 is a prime.

Its product of digits (11664) is a multiple of the sum of its prime divisors (144).

It is a Curzon number.

869913 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8563 + ... + 8663.

It is an arithmetic number, because the mean of its divisors is an integer number (45900).

2⁸⁶⁹⁹¹³ is an apocalyptic number.

It is an amenable number.

869913 is a deficient number, since it is larger than the sum of its proper divisors (598887).

869913 is a wasteful number, since it uses less digits than its factorization.

869913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 144 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 869913 is about 932.6912672476. The cubic root of 869913 is about 95.4608448533.

Subtracting from 869913 its reverse (319968), we obtain a palindrome (549945).

It can be divided in two parts, 869 and 913, that multiplied together give a palindrome (793397).

The spelling of 869913 in words is "eight hundred sixty-nine thousand, nine hundred thirteen".