158057209 has 2 divisors, whose sum is σ = 158057210. Its totient is φ = 158057208.

The previous prime is 158057197. The next prime is 158057231. The reversal of 158057209 is 902750851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158055184 + 2025 = 12572^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 158057209 - 2⁹ = 158056697 is a prime.

It is not a weakly prime, because it can be changed into another prime (158057239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79028604 + 79028605.

It is an arithmetic number, because the mean of its divisors is an integer number (79028605).

Almost surely, 2^158057209 is an apocalyptic number.

It is an amenable number.

158057209 is a deficient number, since it is larger than the sum of its proper divisors (1).

158057209 is an equidigital number, since it uses as much as digits as its factorization.

158057209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 158057209 is about 12572.0805358540. The cubic root of 158057209 is about 540.6772583785.

The spelling of 158057209 in words is "one hundred fifty-eight million, fifty-seven thousand, two hundred nine".