167998 has 8 divisors (see below), whose sum is σ = 265320. Its totient is φ = 79560.

The previous prime is 167987. The next prime is 168013. The reversal of 167998 is 899761.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 167998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2173 + ... + 2248.

It is an arithmetic number, because the mean of its divisors is an integer number (33165).

2¹⁶⁷⁹⁹⁸ is an apocalyptic number.

167998 is a deficient number, since it is larger than the sum of its proper divisors (97322).

167998 is a wasteful number, since it uses less digits than its factorization.

167998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442.

The product of its digits is 27216, while the sum is 40.

The square root of 167998 is about 409.8755908809. The cubic root of 167998 is about 55.1782645645.

It can be divided in two parts, 16799 and 8, that added together give a 5-th power (16807 = 7⁵).

The spelling of 167998 in words is "one hundred sixty-seven thousand, nine hundred ninety-eight".