158991379 has 2 divisors, whose sum is σ = 158991380. Its totient is φ = 158991378.

The previous prime is 158991359. The next prime is 158991383. The reversal of 158991379 is 973199851.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 158991379 - 2¹¹ = 158989331 is a prime.

It is not a weakly prime, because it can be changed into another prime (158991319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79495689 + 79495690.

It is an arithmetic number, because the mean of its divisors is an integer number (79495690).

Almost surely, 2^158991379 is an apocalyptic number.

158991379 is a deficient number, since it is larger than the sum of its proper divisors (1).

158991379 is an equidigital number, since it uses as much as digits as its factorization.

158991379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 52.

The square root of 158991379 is about 12609.1783633986. The cubic root of 158991379 is about 541.7403600670.

The spelling of 158991379 in words is "one hundred fifty-eight million, nine hundred ninety-one thousand, three hundred seventy-nine".