156109189 has 2 divisors, whose sum is σ = 156109190. Its totient is φ = 156109188.

The previous prime is 156109157. The next prime is 156109207. The reversal of 156109189 is 981901651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107806689 + 48302500 = 10383^2 + 6950^2 .

It is a cyclic number.

It is not a de Polignac number, because 156109189 - 2⁵ = 156109157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156209189) 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, 78054594 + 78054595.

It is an arithmetic number, because the mean of its divisors is an integer number (78054595).

Almost surely, 2^156109189 is an apocalyptic number.

It is an amenable number.

156109189 is a deficient number, since it is larger than the sum of its proper divisors (1).

156109189 is an equidigital number, since it uses as much as digits as its factorization.

156109189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 156109189 is about 12494.3662904527. The cubic root of 156109189 is about 538.4468275589.

The spelling of 156109189 in words is "one hundred fifty-six million, one hundred nine thousand, one hundred eighty-nine".