158828209 has 2 divisors, whose sum is σ = 158828210. Its totient is φ = 158828208.

The previous prime is 158828203. The next prime is 158828233. The reversal of 158828209 is 902828851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91259809 + 67568400 = 9553^2 + 8220^2 .

It is an emirp because it is prime and its reverse (902828851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158828209 - 2⁷ = 158828081 is a prime.

It is not a weakly prime, because it can be changed into another prime (158828203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79414104 + 79414105.

It is an arithmetic number, because the mean of its divisors is an integer number (79414105).

Almost surely, 2^158828209 is an apocalyptic number.

It is an amenable number.

158828209 is a deficient number, since it is larger than the sum of its proper divisors (1).

158828209 is an equidigital number, since it uses as much as digits as its factorization.

158828209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 158828209 is about 12602.7064156871. The cubic root of 158828209 is about 541.5549704942.

The spelling of 158828209 in words is "one hundred fifty-eight million, eight hundred twenty-eight thousand, two hundred nine".