869998 has 8 divisors (see below), whose sum is σ = 1361808. Its totient is φ = 416064.

The previous prime is 869989. The next prime is 870007. The reversal of 869998 is 899968.

It is an interprime number because it is at equal distance from previous prime (869989) and next prime (870007).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

869998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 9411 + ... + 9502.

It is an arithmetic number, because the mean of its divisors is an integer number (170226).

2⁸⁶⁹⁹⁹⁸ is an apocalyptic number.

869998 is a deficient number, since it is larger than the sum of its proper divisors (491810).

869998 is a wasteful number, since it uses less digits than its factorization.

869998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18938.

The product of its digits is 279936, while the sum is 49.

The square root of 869998 is about 932.7368331957. The cubic root of 869998 is about 95.4639539410.

The spelling of 869998 in words is "eight hundred sixty-nine thousand, nine hundred ninety-eight".