158197 has 8 divisors (see below), whose sum is σ = 174944. Its totient is φ = 142128.

The previous prime is 158189. The next prime is 158201. The reversal of 158197 is 791851.

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 158197 - 2³ = 158189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418 + ... + 700.

It is an arithmetic number, because the mean of its divisors is an integer number (21868).

2¹⁵⁸¹⁹⁷ is an apocalyptic number.

It is an amenable number.

158197 is a deficient number, since it is larger than the sum of its proper divisors (16747).

158197 is a wasteful number, since it uses less digits than its factorization.

158197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339.

The product of its digits is 2520, while the sum is 31.

The square root of 158197 is about 397.7398647357. The cubic root of 158197 is about 54.0836609000.

The spelling of 158197 in words is "one hundred fifty-eight thousand, one hundred ninety-seven".