133790749 has 4 divisors (see below), whose sum is σ = 137053980. Its totient is φ = 130527520.

The previous prime is 133790743. The next prime is 133790753. The reversal of 133790749 is 947097331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 947097331 = 5981 ⋅158351.

It can be written as a sum of positive squares in 2 ways, for example, as 60140025 + 73650724 = 7755^2 + 8582^2 .

It is a cyclic number.

It is not a de Polignac number, because 133790749 - 2⁷ = 133790621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133790743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1631554 + ... + 1631635.

It is an arithmetic number, because the mean of its divisors is an integer number (34263495).

Almost surely, 2^133790749 is an apocalyptic number.

It is an amenable number.

133790749 is a deficient number, since it is larger than the sum of its proper divisors (3263231).

133790749 is an equidigital number, since it uses as much as digits as its factorization.

133790749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263230.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 133790749 is about 11566.7951049545. The cubic root of 133790749 is about 511.4564913733.

The spelling of 133790749 in words is "one hundred thirty-three million, seven hundred ninety thousand, seven hundred forty-nine".