159197901 has 12 divisors (see below), whose sum is σ = 214879968. Its totient is φ = 104839624.

The previous prime is 159197897. The next prime is 159197923. The reversal of 159197901 is 109791951.

It is a happy number.

It is not a de Polignac number, because 159197901 - 2² = 159197897 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159197981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16816 + ... + 24518.

It is an arithmetic number, because the mean of its divisors is an integer number (17906664).

Almost surely, 2^159197901 is an apocalyptic number.

It is an amenable number.

159197901 is a deficient number, since it is larger than the sum of its proper divisors (55682067).

159197901 is an frugal number, since it uses more digits than its factorization.

159197901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7872 (or 7789 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 42.

The square root of 159197901 is about 12617.3650577290. The cubic root of 159197901 is about 541.9748232928.

The spelling of 159197901 in words is "one hundred fifty-nine million, one hundred ninety-seven thousand, nine hundred one".