159871690 has 32 divisors (see below), whose sum is σ = 314622144. Its totient is φ = 58007040.

The previous prime is 159871661. The next prime is 159871697. The reversal of 159871690 is 96178951.

It is a happy number.

159871690 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×159871690² = 51117914526912200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 159871690.

It is not an unprimeable number, because it can be changed into a prime (159871697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58842 + ... + 61498.

It is an arithmetic number, because the mean of its divisors is an integer number (9831942).

Almost surely, 2^159871690 is an apocalyptic number.

159871690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

159871690 is a deficient number, since it is larger than the sum of its proper divisors (154750454).

159871690 is a wasteful number, since it uses less digits than its factorization.

159871690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 159871690 is about 12644.0377253471. The cubic root of 159871690 is about 542.7383649576.

The spelling of 159871690 in words is "one hundred fifty-nine million, eight hundred seventy-one thousand, six hundred ninety".