158845009 has 2 divisors, whose sum is σ = 158845010. Its totient is φ = 158845008.

The previous prime is 158845003. The next prime is 158845013. The reversal of 158845009 is 900548851.

158845009 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., 155550784 + 3294225 = 12472^2 + 1815^2 .

It is a cyclic number.

It is not a de Polignac number, because 158845009 - 2²³ = 150456401 is a prime.

It is not a weakly prime, because it can be changed into another prime (158845003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79422504 + 79422505.

It is an arithmetic number, because the mean of its divisors is an integer number (79422505).

Almost surely, 2^158845009 is an apocalyptic number.

It is an amenable number.

158845009 is a deficient number, since it is larger than the sum of its proper divisors (1).

158845009 is an equidigital number, since it uses as much as digits as its factorization.

158845009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 158845009 is about 12603.3729215635. The cubic root of 158845009 is about 541.5740640855.

The spelling of 158845009 in words is "one hundred fifty-eight million, eight hundred forty-five thousand, nine".