156112009 has 2 divisors, whose sum is σ = 156112010. Its totient is φ = 156112008.

The previous prime is 156112007. The next prime is 156112027. The reversal of 156112009 is 900211651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92160000 + 63952009 = 9600^2 + 7997^2 .

It is a cyclic number.

It is not a de Polignac number, because 156112009 - 2¹ = 156112007 is a prime.

Together with 156112007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (156112007) 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, 78056004 + 78056005.

It is an arithmetic number, because the mean of its divisors is an integer number (78056005).

Almost surely, 2^156112009 is an apocalyptic number.

It is an amenable number.

156112009 is a deficient number, since it is larger than the sum of its proper divisors (1).

156112009 is an equidigital number, since it uses as much as digits as its factorization.

156112009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 156112009 is about 12494.4791408045. The cubic root of 156112009 is about 538.4500697573.

The spelling of 156112009 in words is "one hundred fifty-six million, one hundred twelve thousand, nine".