158995091 has 4 divisors (see below), whose sum is σ = 159036000. Its totient is φ = 158954184.

The previous prime is 158995079. The next prime is 158995099. The reversal of 158995091 is 190599851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190599851 = 13 ⋅14661527.

It is a cyclic number.

It is not a de Polignac number, because 158995091 - 2⁶ = 158995027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158995099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13931 + ... + 22628.

It is an arithmetic number, because the mean of its divisors is an integer number (39759000).

Almost surely, 2^158995091 is an apocalyptic number.

158995091 is a deficient number, since it is larger than the sum of its proper divisors (40909).

158995091 is an equidigital number, since it uses as much as digits as its factorization.

158995091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40908.

The product of its (nonzero) digits is 145800, while the sum is 47.

The square root of 158995091 is about 12609.3255569043. The cubic root of 158995091 is about 541.7445760703.

The spelling of 158995091 in words is "one hundred fifty-eight million, nine hundred ninety-five thousand, ninety-one".