158773091 has 4 divisors (see below), whose sum is σ = 158811432. Its totient is φ = 158734752.

The previous prime is 158773067. The next prime is 158773099. The reversal of 158773091 is 190377851.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158773091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158773099) 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 in 3 ways as a sum of consecutive naturals, for example, 12086 + ... + 21531.

It is an arithmetic number, because the mean of its divisors is an integer number (39702858).

Almost surely, 2^158773091 is an apocalyptic number.

158773091 is a deficient number, since it is larger than the sum of its proper divisors (38341).

158773091 is an equidigital number, since it uses as much as digits as its factorization.

158773091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38340.

The product of its (nonzero) digits is 52920, while the sum is 41.

The square root of 158773091 is about 12600.5194734185. The cubic root of 158773091 is about 541.4923181468.

The spelling of 158773091 in words is "one hundred fifty-eight million, seven hundred seventy-three thousand, ninety-one".