158879209 has 2 divisors, whose sum is σ = 158879210. Its totient is φ = 158879208.

The previous prime is 158879207. The next prime is 158879219. The reversal of 158879209 is 902978851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148766809 + 10112400 = 12197^2 + 3180^2 .

It is a cyclic number.

It is not a de Polignac number, because 158879209 - 2¹ = 158879207 is a prime.

Together with 158879207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (158879207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79439604 + 79439605.

It is an arithmetic number, because the mean of its divisors is an integer number (79439605).

Almost surely, 2^158879209 is an apocalyptic number.

It is an amenable number.

158879209 is a deficient number, since it is larger than the sum of its proper divisors (1).

158879209 is an equidigital number, since it uses as much as digits as its factorization.

158879209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 49.

The square root of 158879209 is about 12604.7296281991. The cubic root of 158879209 is about 541.6129290227.

The spelling of 158879209 in words is "one hundred fifty-eight million, eight hundred seventy-nine thousand, two hundred nine".