158309329 has 2 divisors, whose sum is σ = 158309330. Its totient is φ = 158309328.

The previous prime is 158309269. The next prime is 158309341. The reversal of 158309329 is 923903851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135489600 + 22819729 = 11640^2 + 4777^2 .

It is a cyclic number.

It is not a de Polignac number, because 158309329 - 2¹⁷ = 158178257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 158309291 and 158309300.

It is not a weakly prime, because it can be changed into another prime (158309369) 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, 79154664 + 79154665.

It is an arithmetic number, because the mean of its divisors is an integer number (79154665).

Almost surely, 2^158309329 is an apocalyptic number.

It is an amenable number.

158309329 is a deficient number, since it is larger than the sum of its proper divisors (1).

158309329 is an equidigital number, since it uses as much as digits as its factorization.

158309329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 158309329 is about 12582.1035204770. The cubic root of 158309329 is about 540.9645871155.

The spelling of 158309329 in words is "one hundred fifty-eight million, three hundred nine thousand, three hundred twenty-nine".