869139 has 12 divisors (see below), whose sum is σ = 1263600. Its totient is φ = 575664.

The previous prime is 869137. The next prime is 869153. The reversal of 869139 is 931968.

869139 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 869139 - 2¹ = 869137 is a prime.

It is an Ulam number.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 869139.

It is not an unprimeable number, because it can be changed into a prime (869131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2242 + ... + 2600.

It is an arithmetic number, because the mean of its divisors is an integer number (105300).

2⁸⁶⁹¹³⁹ is an apocalyptic number.

869139 is a deficient number, since it is larger than the sum of its proper divisors (394461).

869139 is a wasteful number, since it uses less digits than its factorization.

869139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 631 counting only the distinct ones).

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

The square root of 869139 is about 932.2762466136. The cubic root of 869139 is about 95.4325245430.

The spelling of 869139 in words is "eight hundred sixty-nine thousand, one hundred thirty-nine".