168998 has 4 divisors (see below), whose sum is σ = 253500. Its totient is φ = 84498.

The previous prime is 168991. The next prime is 169003. The reversal of 168998 is 899861.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42248 + ... + 42251.

It is an arithmetic number, because the mean of its divisors is an integer number (63375).

2¹⁶⁸⁹⁹⁸ is an apocalyptic number.

168998 is a deficient number, since it is larger than the sum of its proper divisors (84502).

168998 is an equidigital number, since it uses as much as digits as its factorization.

168998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84501.

The product of its digits is 31104, while the sum is 41.

The square root of 168998 is about 411.0936632934. The cubic root of 168998 is about 55.2875300383.

The spelling of 168998 in words is "one hundred sixty-eight thousand, nine hundred ninety-eight".