869391 has 12 divisors (see below), whose sum is σ = 1299480. Its totient is φ = 559440.

The previous prime is 869381. The next prime is 869399. The reversal of 869391 is 193968.

It is not a de Polignac number, because 869391 - 2¹¹ = 867343 is a prime.

It is a super-3 number, since 3×869391³ = 1971363334420630413, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869399) 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, 1405 + ... + 1926.

It is an arithmetic number, because the mean of its divisors is an integer number (108290).

2⁸⁶⁹³⁹¹ is an apocalyptic number.

869391 is a deficient number, since it is larger than the sum of its proper divisors (430089).

869391 is a wasteful number, since it uses less digits than its factorization.

869391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366 (or 3363 counting only the distinct ones).

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

The square root of 869391 is about 932.4113898918. The cubic root of 869391 is about 95.4417469544.

The spelling of 869391 in words is "eight hundred sixty-nine thousand, three hundred ninety-one".