156404089 has 2 divisors, whose sum is σ = 156404090. Its totient is φ = 156404088.

The previous prime is 156404057. The next prime is 156404093. The reversal of 156404089 is 980404651.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156050064 + 354025 = 12492^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 156404089 - 2⁵ = 156404057 is a prime.

It is not a weakly prime, because it can be changed into another prime (156404099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78202044 + 78202045.

It is an arithmetic number, because the mean of its divisors is an integer number (78202045).

Almost surely, 2^156404089 is an apocalyptic number.

It is an amenable number.

156404089 is a deficient number, since it is larger than the sum of its proper divisors (1).

156404089 is an equidigital number, since it uses as much as digits as its factorization.

156404089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 156404089 is about 12506.1620411699. The cubic root of 156404089 is about 538.7856675047.

The spelling of 156404089 in words is "one hundred fifty-six million, four hundred four thousand, eighty-nine".