133668823 has 2 divisors, whose sum is σ = 133668824. Its totient is φ = 133668822.

The previous prime is 133668803. The next prime is 133668839. The reversal of 133668823 is 328866331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133668823 - 2⁵ = 133668791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133668803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66834411 + 66834412.

It is an arithmetic number, because the mean of its divisors is an integer number (66834412).

Almost surely, 2^133668823 is an apocalyptic number.

133668823 is a deficient number, since it is larger than the sum of its proper divisors (1).

133668823 is an equidigital number, since it uses as much as digits as its factorization.

133668823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 40.

The square root of 133668823 is about 11561.5233857827. The cubic root of 133668823 is about 511.3010775462.

The spelling of 133668823 in words is "one hundred thirty-three million, six hundred sixty-eight thousand, eight hundred twenty-three".