159990 has 16 divisors (see below), whose sum is σ = 384048. Its totient is φ = 42656.

The previous prime is 159979. The next prime is 160001. The reversal of 159990 is 99951.

It is an interprime number because it is at equal distance from previous prime (159979) and next prime (160001).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2637 + ... + 2696.

It is an arithmetic number, because the mean of its divisors is an integer number (24003).

2¹⁵⁹⁹⁹⁰ is an apocalyptic number.

159990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

159990 is an abundant number, since it is smaller than the sum of its proper divisors (224058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

159990 is a wasteful number, since it uses less digits than its factorization.

159990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5343.

The product of its (nonzero) digits is 3645, while the sum is 33.

The square root of 159990 is about 399.9874998047. The cubic root of 159990 is about 54.2872213010.

The spelling of 159990 in words is "one hundred fifty-nine thousand, nine hundred ninety".