159117437 has 4 divisors (see below), whose sum is σ = 160577340. Its totient is φ = 157657536.

The previous prime is 159117407. The next prime is 159117449. The reversal of 159117437 is 734711951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 734711951 = 9187 ⋅79973.

It can be written as a sum of positive squares in 2 ways, for example, as 144264121 + 14853316 = 12011^2 + 3854^2 .

It is a cyclic number.

It is not a de Polignac number, because 159117437 - 2¹² = 159113341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 159117437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159117407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729788 + ... + 730005.

It is an arithmetic number, because the mean of its divisors is an integer number (40144335).

Almost surely, 2^159117437 is an apocalyptic number.

It is an amenable number.

159117437 is a deficient number, since it is larger than the sum of its proper divisors (1459903).

159117437 is a wasteful number, since it uses less digits than its factorization.

159117437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459902.

The product of its digits is 26460, while the sum is 38.

The square root of 159117437 is about 12614.1760333365. The cubic root of 159117437 is about 541.8834971065.

The spelling of 159117437 in words is "one hundred fifty-nine million, one hundred seventeen thousand, four hundred thirty-seven".