159931797 has 16 divisors (see below), whose sum is σ = 230535360. Its totient is φ = 98278272.

The previous prime is 159931771. The next prime is 159931799. The reversal of 159931797 is 797139951.

It is not a de Polignac number, because 159931797 - 2¹⁹ = 159407509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159931799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35808 + ... + 40025.

It is an arithmetic number, because the mean of its divisors is an integer number (14408460).

Almost surely, 2^159931797 is an apocalyptic number.

It is an amenable number.

159931797 is a deficient number, since it is larger than the sum of its proper divisors (70603563).

159931797 is a wasteful number, since it uses less digits than its factorization.

159931797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75892.

The product of its digits is 535815, while the sum is 51.

The square root of 159931797 is about 12646.4143930207. The cubic root of 159931797 is about 542.8063742622.

The spelling of 159931797 in words is "one hundred fifty-nine million, nine hundred thirty-one thousand, seven hundred ninety-seven".