149194189 has 4 divisors (see below), whose sum is σ = 149220220. Its totient is φ = 149168160.

The previous prime is 149194153. The next prime is 149194223. The reversal of 149194189 is 981491941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25050025 + 124144164 = 5005^2 + 11142^2 .

It is a cyclic number.

It is not a de Polignac number, because 149194189 - 2¹⁵ = 149161421 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 (149194109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234 + ... + 17275.

It is an arithmetic number, because the mean of its divisors is an integer number (37305055).

Almost surely, 2^149194189 is an apocalyptic number.

It is an amenable number.

149194189 is a deficient number, since it is larger than the sum of its proper divisors (26031).

149194189 is an equidigital number, since it uses as much as digits as its factorization.

149194189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26030.

The product of its digits is 93312, while the sum is 46.

The square root of 149194189 is about 12214.5073171209. The cubic root of 149194189 is about 530.3761291142.

The spelling of 149194189 in words is "one hundred forty-nine million, one hundred ninety-four thousand, one hundred eighty-nine".