869993 has 4 divisors (see below), whose sum is σ = 879060. Its totient is φ = 860928.

The previous prime is 869989. The next prime is 870007. The reversal of 869993 is 399968.

869993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 425104 + 444889 = 652^2 + 667^2 .

It is a cyclic number.

It is not a de Polignac number, because 869993 - 2² = 869989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869983) 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, 4388 + ... + 4581.

It is an arithmetic number, because the mean of its divisors is an integer number (219765).

2⁸⁶⁹⁹⁹³ is an apocalyptic number.

It is an amenable number.

869993 is a deficient number, since it is larger than the sum of its proper divisors (9067).

869993 is an equidigital number, since it uses as much as digits as its factorization.

869993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9066.

The product of its digits is 104976, while the sum is 44.

The square root of 869993 is about 932.7341529075. The cubic root of 869993 is about 95.4637710591.

The spelling of 869993 in words is "eight hundred sixty-nine thousand, nine hundred ninety-three".