133513123 has 2 divisors, whose sum is σ = 133513124. Its totient is φ = 133513122.

The previous prime is 133513117. The next prime is 133513181. The reversal of 133513123 is 321315331.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133513123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133513094 and 133513103.

It is not a weakly prime, because it can be changed into another prime (133513103) 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 as a sum of consecutive naturals, namely, 66756561 + 66756562.

It is an arithmetic number, because the mean of its divisors is an integer number (66756562).

Almost surely, 2^133513123 is an apocalyptic number.

133513123 is a deficient number, since it is larger than the sum of its proper divisors (1).

133513123 is an equidigital number, since it uses as much as digits as its factorization.

133513123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810, while the sum is 22.

The square root of 133513123 is about 11554.7878820859. The cubic root of 133513123 is about 511.1024759918.

Adding to 133513123 its reverse (321315331), we get a palindrome (454828454).

The spelling of 133513123 in words is "one hundred thirty-three million, five hundred thirteen thousand, one hundred twenty-three".