158538137 has 2 divisors, whose sum is σ = 158538138. Its totient is φ = 158538136.

The previous prime is 158538089. The next prime is 158538139. The reversal of 158538137 is 731835851.

158538137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130965136 + 27573001 = 11444^2 + 5251^2 .

It is a cyclic number.

It is not a de Polignac number, because 158538137 - 2²⁰ = 157489561 is a prime.

Together with 158538139, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 158538094 and 158538103.

It is not a weakly prime, because it can be changed into another prime (158538139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79269068 + 79269069.

It is an arithmetic number, because the mean of its divisors is an integer number (79269069).

Almost surely, 2^158538137 is an apocalyptic number.

It is an amenable number.

158538137 is a deficient number, since it is larger than the sum of its proper divisors (1).

158538137 is an equidigital number, since it uses as much as digits as its factorization.

158538137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The square root of 158538137 is about 12591.1928346761. The cubic root of 158538137 is about 541.2250843781.

The spelling of 158538137 in words is "one hundred fifty-eight million, five hundred thirty-eight thousand, one hundred thirty-seven".