869799 has 24 divisors (see below), whose sum is σ = 1385328. Its totient is φ = 483840.

The previous prime is 869779. The next prime is 869807. The reversal of 869799 is 997968.

It is a happy number.

It is not a de Polignac number, because 869799 - 2⁸ = 869543 is a prime.

Its product of digits (244944) is a multiple of the sum of its prime divisors (168).

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 869799.

It is not an unprimeable number, because it can be changed into a prime (869779) 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 23 ways as a sum of consecutive naturals, for example, 8919 + ... + 9015.

It is an arithmetic number, because the mean of its divisors is an integer number (57722).

2⁸⁶⁹⁷⁹⁹ is an apocalyptic number.

869799 is a deficient number, since it is larger than the sum of its proper divisors (515529).

869799 is a wasteful number, since it uses less digits than its factorization.

869799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 168 counting only the distinct ones).

The product of its digits is 244944, while the sum is 48.

The square root of 869799 is about 932.6301517751. The cubic root of 869799 is about 95.4566747000.

The spelling of 869799 in words is "eight hundred sixty-nine thousand, seven hundred ninety-nine".