158354591 has 4 divisors (see below), whose sum is σ = 158870712. Its totient is φ = 157838472.

The previous prime is 158354579. The next prime is 158354611. The reversal of 158354591 is 195453851.

158354591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195453851 = 1217 ⋅160603.

It is a cyclic number.

It is not a de Polignac number, because 158354591 - 2⁶ = 158354527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158354501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257600 + ... + 258213.

It is an arithmetic number, because the mean of its divisors is an integer number (39717678).

Almost surely, 2^158354591 is an apocalyptic number.

158354591 is a deficient number, since it is larger than the sum of its proper divisors (516121).

158354591 is an equidigital number, since it uses as much as digits as its factorization.

158354591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516120.

The product of its digits is 108000, while the sum is 41.

The square root of 158354591 is about 12583.9020577880. The cubic root of 158354591 is about 541.0161376804.

The spelling of 158354591 in words is "one hundred fifty-eight million, three hundred fifty-four thousand, five hundred ninety-one".