159899890 has 8 divisors (see below), whose sum is σ = 287819820. Its totient is φ = 63959952.

The previous prime is 159899879. The next prime is 159899893. The reversal of 159899890 is 98998951.

It is a happy number.

159899890 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 can be written as a sum of positive squares in 2 ways, for example, as 156225001 + 3674889 = 12499^2 + 1917^2 .

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

It is not an unprimeable number, because it can be changed into a prime (159899893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7994985 + ... + 7995004.

Almost surely, 2^159899890 is an apocalyptic number.

159899890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

159899890 is a deficient number, since it is larger than the sum of its proper divisors (127919930).

159899890 is a wasteful number, since it uses less digits than its factorization.

159899890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15989996.

The product of its (nonzero) digits is 2099520, while the sum is 58.

The square root of 159899890 is about 12645.1528262809. The cubic root of 159899890 is about 542.7702745514.

The spelling of 159899890 in words is "one hundred fifty-nine million, eight hundred ninety-nine thousand, eight hundred ninety".