133404123 has 4 divisors (see below), whose sum is σ = 177872168. Its totient is φ = 88936080.

The previous prime is 133404113. The next prime is 133404137. The reversal of 133404123 is 321404331.

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

It is not a de Polignac number, because 133404123 - 2⁵ = 133404091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133404123.

It is not an unprimeable number, because it can be changed into a prime (133404113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22234018 + ... + 22234023.

It is an arithmetic number, because the mean of its divisors is an integer number (44468042).

Almost surely, 2^133404123 is an apocalyptic number.

133404123 is a deficient number, since it is larger than the sum of its proper divisors (44468045).

133404123 is an equidigital number, since it uses as much as digits as its factorization.

133404123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44468044.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 133404123 is about 11550.0702595266. The cubic root of 133404123 is about 510.9633502488.

Adding to 133404123 its reverse (321404331), we get a palindrome (454808454).

The spelling of 133404123 in words is "one hundred thirty-three million, four hundred four thousand, one hundred twenty-three".