149638133 has 4 divisors (see below), whose sum is σ = 152461548. Its totient is φ = 146814720.

The previous prime is 149638079. The next prime is 149638141. The reversal of 149638133 is 331836941.

It is a happy number.

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 136843204 + 12794929 = 11698^2 + 3577^2 .

It is a cyclic number.

It is not a de Polignac number, because 149638133 - 2¹⁰ = 149637109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149638193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1411628 + ... + 1411733.

It is an arithmetic number, because the mean of its divisors is an integer number (38115387).

Almost surely, 2^149638133 is an apocalyptic number.

It is an amenable number.

149638133 is a deficient number, since it is larger than the sum of its proper divisors (2823415).

149638133 is an equidigital number, since it uses as much as digits as its factorization.

149638133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823414.

The product of its digits is 46656, while the sum is 38.

The square root of 149638133 is about 12232.6666348757. Note that the first 4 decimals coincide. The cubic root of 149638133 is about 530.9016726893.

The spelling of 149638133 in words is "one hundred forty-nine million, six hundred thirty-eight thousand, one hundred thirty-three".