133830427 has 4 divisors (see below), whose sum is σ = 134148736. Its totient is φ = 133512120.

The previous prime is 133830421. The next prime is 133830449. The reversal of 133830427 is 724038331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724038331 = 29 ⋅24966839.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133830427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133830421) 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, 158523 + ... + 159364.

It is an arithmetic number, because the mean of its divisors is an integer number (33537184).

Almost surely, 2^133830427 is an apocalyptic number.

133830427 is a deficient number, since it is larger than the sum of its proper divisors (318309).

133830427 is an equidigital number, since it uses as much as digits as its factorization.

133830427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318308.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 133830427 is about 11568.5101460819. The cubic root of 133830427 is about 511.5070468489.

Subtracting from 133830427 its product of nonzero digits (12096), we obtain a palindrome (133818331).

Adding to 133830427 its reverse (724038331), we get a palindrome (857868758).

It can be divided in two parts, 1338304 and 27, that added together give a palindrome (1338331).

The spelling of 133830427 in words is "one hundred thirty-three million, eight hundred thirty thousand, four hundred twenty-seven".