158293891 has 8 divisors (see below), whose sum is σ = 181105920. Its totient is φ = 135531528.

The previous prime is 158293847. The next prime is 158293897. The reversal of 158293891 is 198392851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158293891 - 2¹⁵ = 158261123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158293897) 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 7 ways as a sum of consecutive naturals, for example, 5311 + ... + 18568.

It is an arithmetic number, because the mean of its divisors is an integer number (22638240).

Almost surely, 2^158293891 is an apocalyptic number.

158293891 is a deficient number, since it is larger than the sum of its proper divisors (22812029).

158293891 is an equidigital number, since it uses as much as digits as its factorization.

158293891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24833.

The product of its digits is 155520, while the sum is 46.

The square root of 158293891 is about 12581.4900150976. The cubic root of 158293891 is about 540.9470019594.

The spelling of 158293891 in words is "one hundred fifty-eight million, two hundred ninety-three thousand, eight hundred ninety-one".