159205990 has 16 divisors (see below), whose sum is σ = 286724448. Its totient is φ = 63648256.

The previous prime is 159205979. The next prime is 159205999. The reversal of 159205990 is 99502951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159205999) 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, 24639 + ... + 30421.

It is an arithmetic number, because the mean of its divisors is an integer number (17920278).

Almost surely, 2^159205990 is an apocalyptic number.

159205990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

159205990 is a deficient number, since it is larger than the sum of its proper divisors (127518458).

159205990 is a wasteful number, since it uses less digits than its factorization.

159205990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8543.

The product of its (nonzero) digits is 36450, while the sum is 40.

The square root of 159205990 is about 12617.6856039450. The cubic root of 159205990 is about 541.9840025597.

The spelling of 159205990 in words is "one hundred fifty-nine million, two hundred five thousand, nine hundred ninety".