167990 has 16 divisors (see below), whose sum is σ = 307152. Its totient is φ = 66144.

The previous prime is 167987. The next prime is 168013. The reversal of 167990 is 99761.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 992 + ... + 1148.

It is an arithmetic number, because the mean of its divisors is an integer number (19197).

2¹⁶⁷⁹⁹⁰ is an apocalyptic number.

167990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

167990 is a deficient number, since it is larger than the sum of its proper divisors (139162).

167990 is a wasteful number, since it uses less digits than its factorization.

167990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 167990 is about 409.8658317059. The cubic root of 167990 is about 55.1773886947.

The spelling of 167990 in words is "one hundred sixty-seven thousand, nine hundred ninety".