159861097 has 4 divisors (see below), whose sum is σ = 174393936. Its totient is φ = 145328260.

The previous prime is 159861089. The next prime is 159861101. The reversal of 159861097 is 790168951.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 159861097 - 2³ = 159861089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159861077) 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 3 ways as a sum of consecutive naturals, for example, 7266403 + ... + 7266424.

It is an arithmetic number, because the mean of its divisors is an integer number (43598484).

Almost surely, 2^159861097 is an apocalyptic number.

It is an amenable number.

159861097 is a deficient number, since it is larger than the sum of its proper divisors (14532839).

159861097 is a wasteful number, since it uses less digits than its factorization.

159861097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14532838.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 159861097 is about 12643.6188253205. The cubic root of 159861097 is about 542.7263775226.

The spelling of 159861097 in words is "one hundred fifty-nine million, eight hundred sixty-one thousand, ninety-seven".