19890159 has 8 divisors (see below), whose sum is σ = 26698800. Its totient is φ = 13170816.

The previous prime is 19890149. The next prime is 19890161. The reversal of 19890159 is 95109891.

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

It is not a de Polignac number, because 19890159 - 2⁹ = 19889647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19890159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19890149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21802 + ... + 22695.

It is an arithmetic number, because the mean of its divisors is an integer number (3337350).

Almost surely, 2^19890159 is an apocalyptic number.

19890159 is a deficient number, since it is larger than the sum of its proper divisors (6808641).

19890159 is a wasteful number, since it uses less digits than its factorization.

19890159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44649.

The product of its (nonzero) digits is 29160, while the sum is 42.

The square root of 19890159 is about 4459.8384499890. The cubic root of 19890159 is about 270.9439252543.

The spelling of 19890159 in words is "nineteen million, eight hundred ninety thousand, one hundred fifty-nine".