133664123 has 2 divisors, whose sum is σ = 133664124. Its totient is φ = 133664122.

The previous prime is 133664117. The next prime is 133664137. The reversal of 133664123 is 321466331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133664123 - 2⁸ = 133663867 is a prime.

It is equal to p_7574024 and since 133664123 and 7574024 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (133664623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66832061 + 66832062.

It is an arithmetic number, because the mean of its divisors is an integer number (66832062).

Almost surely, 2^133664123 is an apocalyptic number.

133664123 is a deficient number, since it is larger than the sum of its proper divisors (1).

133664123 is an equidigital number, since it uses as much as digits as its factorization.

133664123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 29.

The square root of 133664123 is about 11561.3201235845. The cubic root of 133664123 is about 511.2950847670.

The spelling of 133664123 in words is "one hundred thirty-three million, six hundred sixty-four thousand, one hundred twenty-three".