86998 has 4 divisors (see below), whose sum is σ = 130500. Its totient is φ = 43498.

The previous prime is 86993. The next prime is 87011. The reversal of 86998 is 89968.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 86998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86993) by changing a digit.

86998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21748 + ... + 21751.

It is an arithmetic number, because the mean of its divisors is an integer number (32625).

2⁸⁶⁹⁹⁸ is an apocalyptic number.

86998 is a deficient number, since it is larger than the sum of its proper divisors (43502).

86998 is a wasteful number, since it uses less digits than its factorization.

86998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43501.

The product of its digits is 31104, while the sum is 40.

The square root of 86998 is about 294.9542337380. The cubic root of 86998 is about 44.3101366705.

The spelling of 86998 in words is "eighty-six thousand, nine hundred ninety-eight".