133810823 has 2 divisors, whose sum is σ = 133810824. Its totient is φ = 133810822.

The previous prime is 133810819. The next prime is 133810841. The reversal of 133810823 is 328018331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133810823 - 2² = 133810819 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133819823) 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 as a sum of consecutive naturals, namely, 66905411 + 66905412.

It is an arithmetic number, because the mean of its divisors is an integer number (66905412).

Almost surely, 2^133810823 is an apocalyptic number.

133810823 is a deficient number, since it is larger than the sum of its proper divisors (1).

133810823 is an equidigital number, since it uses as much as digits as its factorization.

133810823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 133810823 is about 11567.6628149337. The cubic root of 133810823 is about 511.4820697839.

The spelling of 133810823 in words is "one hundred thirty-three million, eight hundred ten thousand, eight hundred twenty-three".