869955 has 16 divisors (see below), whose sum is σ = 1416960. Its totient is φ = 455648.

The previous prime is 869951. The next prime is 869959. The reversal of 869955 is 559968.

It is an interprime number because it is at equal distance from previous prime (869951) and next prime (869959).

It is a cyclic number.

It is not a de Polignac number, because 869955 - 2² = 869951 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

869955 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (869951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (88560).

2⁸⁶⁹⁹⁵⁵ is an apocalyptic number.

869955 is a deficient number, since it is larger than the sum of its proper divisors (547005).

869955 is a wasteful number, since it uses less digits than its factorization.

869955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050.

The product of its digits is 97200, while the sum is 42.

The square root of 869955 is about 932.7137824649. The cubic root of 869955 is about 95.4623811337.

The spelling of 869955 in words is "eight hundred sixty-nine thousand, nine hundred fifty-five".