159505997 has 16 divisors (see below), whose sum is σ = 185334912. Its totient is φ = 134453760.

The previous prime is 159505987. The next prime is 159506023. The reversal of 159505997 is 799505951.

It is a happy number.

159505997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-159505997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159505937) 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, 162773 + ... + 163749.

It is an arithmetic number, because the mean of its divisors is an integer number (11583432).

Almost surely, 2^159505997 is an apocalyptic number.

It is an amenable number.

159505997 is a deficient number, since it is larger than the sum of its proper divisors (25828915).

159505997 is an equidigital number, since it uses as much as digits as its factorization.

159505997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348.

The product of its (nonzero) digits is 637875, while the sum is 50.

The square root of 159505997 is about 12629.5683615870. The cubic root of 159505997 is about 542.3242262910.

The spelling of 159505997 in words is "one hundred fifty-nine million, five hundred five thousand, nine hundred ninety-seven".