159981297 has 16 divisors (see below), whose sum is σ = 251645952. Its totient is φ = 88468560.

The previous prime is 159981277. The next prime is 159981331. The reversal of 159981297 is 792189951.

159981297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 159981297 - 2¹⁴ = 159964913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (159981277) 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, 122223 + ... + 123524.

It is an arithmetic number, because the mean of its divisors is an integer number (15727872).

Almost surely, 2^159981297 is an apocalyptic number.

It is an amenable number.

159981297 is a deficient number, since it is larger than the sum of its proper divisors (91664655).

159981297 is a wasteful number, since it uses less digits than its factorization.

159981297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245788.

The product of its digits is 408240, while the sum is 51.

The square root of 159981297 is about 12648.3713180789. The cubic root of 159981297 is about 542.8623692644.

The spelling of 159981297 in words is "one hundred fifty-nine million, nine hundred eighty-one thousand, two hundred ninety-seven".