159397 has 6 divisors (see below), whose sum is σ = 185478. Its totient is φ = 136584.

The previous prime is 159389. The next prime is 159403. The reversal of 159397 is 793951.

It can be written as a sum of positive squares in only one way, i.e., 159201 + 196 = 399^2 + 14^2 .

It is not a de Polignac number, because 159397 - 2³ = 159389 is a prime.

It is an Ulam number.

It is a Duffinian number.

159397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159337) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1578 + ... + 1675.

It is an arithmetic number, because the mean of its divisors is an integer number (30913).

2¹⁵⁹³⁹⁷ is an apocalyptic number.

It is an amenable number.

159397 is a deficient number, since it is larger than the sum of its proper divisors (26081).

159397 is an equidigital number, since it uses as much as digits as its factorization.

159397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267 (or 3260 counting only the distinct ones).

The product of its digits is 8505, while the sum is 34.

The square root of 159397 is about 399.2455384848. The cubic root of 159397 is about 54.2200667335.

The spelling of 159397 in words is "one hundred fifty-nine thousand, three hundred ninety-seven".