158979389 has 2 divisors, whose sum is σ = 158979390. Its totient is φ = 158979388.

The previous prime is 158979371. The next prime is 158979391. The reversal of 158979389 is 983979851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149572900 + 9406489 = 12230^2 + 3067^2 .

It is a cyclic number.

It is not a de Polignac number, because 158979389 - 2²⁰ = 157930813 is a prime.

It is a super-2 number, since 2×158979389² = 50548892253626642, which contains 22 as substring.

Together with 158979391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158979329) 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, 79489694 + 79489695.

It is an arithmetic number, because the mean of its divisors is an integer number (79489695).

Almost surely, 2^158979389 is an apocalyptic number.

It is an amenable number.

158979389 is a deficient number, since it is larger than the sum of its proper divisors (1).

158979389 is an equidigital number, since it uses as much as digits as its factorization.

158979389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 59.

The square root of 158979389 is about 12608.7029071194. The cubic root of 158979389 is about 541.7267416552.

The spelling of 158979389 in words is "one hundred fifty-eight million, nine hundred seventy-nine thousand, three hundred eighty-nine".