133805807 has 2 divisors, whose sum is σ = 133805808. Its totient is φ = 133805806.

The previous prime is 133805779. The next prime is 133805813. The reversal of 133805807 is 708508331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133805807 - 2²⁰ = 132757231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133805857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66902903 + 66902904.

It is an arithmetic number, because the mean of its divisors is an integer number (66902904).

Almost surely, 2^133805807 is an apocalyptic number.

133805807 is a deficient number, since it is larger than the sum of its proper divisors (1).

133805807 is an equidigital number, since it uses as much as digits as its factorization.

133805807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 133805807 is about 11567.4460016029. The cubic root of 133805807 is about 511.4756786065.

The spelling of 133805807 in words is "one hundred thirty-three million, eight hundred five thousand, eight hundred seven".