869901 has 4 divisors (see below), whose sum is σ = 1159872. Its totient is φ = 579932.

The previous prime is 869899. The next prime is 869909. The reversal of 869901 is 109968.

It is a happy number.

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 869901 - 2¹ = 869899 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 869901.

It is not an unprimeable number, because it can be changed into a prime (869909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144981 + ... + 144986.

It is an arithmetic number, because the mean of its divisors is an integer number (289968).

2⁸⁶⁹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

869901 is a deficient number, since it is larger than the sum of its proper divisors (289971).

869901 is a wasteful number, since it uses less digits than its factorization.

869901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289970.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 869901 is about 932.6848342286. The cubic root of 869901 is about 95.4604059069.

It can be divided in two parts, 869 and 901, that added together give a triangular number (1770 = T₅₉).

The spelling of 869901 in words is "eight hundred sixty-nine thousand, nine hundred one".