158432194 has 4 divisors (see below), whose sum is σ = 237648294. Its totient is φ = 79216096.

The previous prime is 158432177. The next prime is 158432201. The reversal of 158432194 is 491234851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 491234851 = 23 ⋅21358037.

It can be written as a sum of positive squares in only one way, i.e., 90155025 + 68277169 = 9495^2 + 8263^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39608047 + ... + 39608050.

Almost surely, 2^158432194 is an apocalyptic number.

158432194 is a deficient number, since it is larger than the sum of its proper divisors (79216100).

158432194 is an equidigital number, since it uses as much as digits as its factorization.

158432194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79216099.

The product of its digits is 34560, while the sum is 37.

The square root of 158432194 is about 12586.9851036696. The cubic root of 158432194 is about 541.1044997516.

The spelling of 158432194 in words is "one hundred fifty-eight million, four hundred thirty-two thousand, one hundred ninety-four".