158997194 has 4 divisors (see below), whose sum is σ = 238495794. Its totient is φ = 79498596.

The previous prime is 158997173. The next prime is 158997203. The reversal of 158997194 is 491799851.

158997194 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.

It can be written as a sum of positive squares in only one way, i.e., 151905625 + 7091569 = 12325^2 + 2663^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39749297 + ... + 39749300.

Almost surely, 2^158997194 is an apocalyptic number.

158997194 is a deficient number, since it is larger than the sum of its proper divisors (79498600).

158997194 is an equidigital number, since it uses as much as digits as its factorization.

158997194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79498599.

The product of its digits is 816480, while the sum is 53.

The square root of 158997194 is about 12609.4089472901. The cubic root of 158997194 is about 541.7469645798.

The spelling of 158997194 in words is "one hundred fifty-eight million, nine hundred ninety-seven thousand, one hundred ninety-four".