199154 has 4 divisors (see below), whose sum is σ = 298734. Its totient is φ = 99576.

The previous prime is 199153. The next prime is 199181. The reversal of 199154 is 451991.

199154 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, and also an emirpimes, since its reverse is a distinct semiprime: 451991 = 19 ⋅23789.

It can be written as a sum of positive squares in only one way, i.e., 139129 + 60025 = 373^2 + 245^2 .

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (199151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49787 + ... + 49790.

2¹⁹⁹¹⁵⁴ is an apocalyptic number.

199154 is a deficient number, since it is larger than the sum of its proper divisors (99580).

199154 is an equidigital number, since it uses as much as digits as its factorization.

199154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99579.

The product of its digits is 1620, while the sum is 29.

The square root of 199154 is about 446.2667363808. The cubic root of 199154 is about 58.3977809253.

It can be divided in two parts, 199 and 154, that added together give a palindrome (353).

The spelling of 199154 in words is "one hundred ninety-nine thousand, one hundred fifty-four".