869613 has 4 divisors (see below), whose sum is σ = 1159488. Its totient is φ = 579740.

The previous prime is 869599. The next prime is 869657. The reversal of 869613 is 316968.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 869613 - 2⁴ = 869597 is a prime.

It is a D-number.

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 869613.

It is not an unprimeable number, because it can be changed into a prime (869663) 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, 144933 + ... + 144938.

It is an arithmetic number, because the mean of its divisors is an integer number (289872).

2⁸⁶⁹⁶¹³ is an apocalyptic number.

It is an amenable number.

869613 is a deficient number, since it is larger than the sum of its proper divisors (289875).

869613 is a wasteful number, since it uses less digits than its factorization.

869613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289874.

The product of its digits is 7776, while the sum is 33.

The square root of 869613 is about 932.5304284580. The cubic root of 869613 is about 95.4498699833.

The spelling of 869613 in words is "eight hundred sixty-nine thousand, six hundred thirteen".