159981013 has 8 divisors (see below), whose sum is σ = 161211960. Its totient is φ = 158754240.

The previous prime is 159981001. The next prime is 159981053. The reversal of 159981013 is 310189951.

It is a happy number.

159981013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12552849 + 147428164 = 3543^2 + 12142^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 159981013 - 2¹³ = 159972821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159981053) 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, 143703 + ... + 144811.

It is an arithmetic number, because the mean of its divisors is an integer number (20151495).

Almost surely, 2^159981013 is an apocalyptic number.

It is an amenable number.

159981013 is a deficient number, since it is larger than the sum of its proper divisors (1230947).

159981013 is a wasteful number, since it uses less digits than its factorization.

159981013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087.

The product of its (nonzero) digits is 9720, while the sum is 37.

The square root of 159981013 is about 12648.3600913320. The cubic root of 159981013 is about 542.8620480331.

The spelling of 159981013 in words is "one hundred fifty-nine million, nine hundred eighty-one thousand, thirteen".