158530409 has 2 divisors, whose sum is σ = 158530410. Its totient is φ = 158530408.

The previous prime is 158530397. The next prime is 158530429. The reversal of 158530409 is 904035851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130599184 + 27931225 = 11428^2 + 5285^2 .

It is an emirp because it is prime and its reverse (904035851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158530409 - 2²⁴ = 141753193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (158530429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79265204 + 79265205.

It is an arithmetic number, because the mean of its divisors is an integer number (79265205).

Almost surely, 2^158530409 is an apocalyptic number.

It is an amenable number.

158530409 is a deficient number, since it is larger than the sum of its proper divisors (1).

158530409 is an equidigital number, since it uses as much as digits as its factorization.

158530409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 158530409 is about 12590.8859497654. The cubic root of 158530409 is about 541.2162901630.

The spelling of 158530409 in words is "one hundred fifty-eight million, five hundred thirty thousand, four hundred nine".