156538117 has 2 divisors, whose sum is σ = 156538118. Its totient is φ = 156538116.

The previous prime is 156538079. The next prime is 156538133. The reversal of 156538117 is 711835651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156525121 + 12996 = 12511^2 + 114^2 .

It is an emirp because it is prime and its reverse (711835651) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156538117 is a prime.

It is a super-4 number, since 4×156538117⁴ (a number of 34 digits) contains 4444 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156538177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78269058 + 78269059.

It is an arithmetic number, because the mean of its divisors is an integer number (78269059).

Almost surely, 2^156538117 is an apocalyptic number.

It is an amenable number.

156538117 is a deficient number, since it is larger than the sum of its proper divisors (1).

156538117 is an equidigital number, since it uses as much as digits as its factorization.

156538117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 37.

The square root of 156538117 is about 12511.5193721626. The cubic root of 156538117 is about 538.9395248381.

The spelling of 156538117 in words is "one hundred fifty-six million, five hundred thirty-eight thousand, one hundred seventeen".