158630509 has 2 divisors, whose sum is σ = 158630510. Its totient is φ = 158630508.

The previous prime is 158630489. The next prime is 158630539. The reversal of 158630509 is 905036851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153834409 + 4796100 = 12403^2 + 2190^2 .

It is a cyclic number.

It is not a de Polignac number, because 158630509 - 2⁵ = 158630477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158630539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79315254 + 79315255.

It is an arithmetic number, because the mean of its divisors is an integer number (79315255).

Almost surely, 2^158630509 is an apocalyptic number.

It is an amenable number.

158630509 is a deficient number, since it is larger than the sum of its proper divisors (1).

158630509 is an equidigital number, since it uses as much as digits as its factorization.

158630509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 158630509 is about 12594.8604200285. The cubic root of 158630509 is about 541.3301786221.

The spelling of 158630509 in words is "one hundred fifty-eight million, six hundred thirty thousand, five hundred nine".