158434139 has 2 divisors, whose sum is σ = 158434140. Its totient is φ = 158434138.

The previous prime is 158434109. The next prime is 158434193. The reversal of 158434139 is 931434851.

158434139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (158434193) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (931434851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158434139 - 2¹² = 158430043 is a prime.

It is not a weakly prime, because it can be changed into another prime (158434109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79217069 + 79217070.

It is an arithmetic number, because the mean of its divisors is an integer number (79217070).

Almost surely, 2^158434139 is an apocalyptic number.

158434139 is a deficient number, since it is larger than the sum of its proper divisors (1).

158434139 is an equidigital number, since it uses as much as digits as its factorization.

158434139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 158434139 is about 12587.0623657786. The cubic root of 158434139 is about 541.1067140405.

The spelling of 158434139 in words is "one hundred fifty-eight million, four hundred thirty-four thousand, one hundred thirty-nine".