133407893 has 2 divisors, whose sum is σ = 133407894. Its totient is φ = 133407892.

The previous prime is 133407877. The next prime is 133407907. The reversal of 133407893 is 398704331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102860164 + 30547729 = 10142^2 + 5527^2 .

It is a cyclic number.

It is not a de Polignac number, because 133407893 - 2⁴ = 133407877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133407193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66703946 + 66703947.

It is an arithmetic number, because the mean of its divisors is an integer number (66703947).

Almost surely, 2^133407893 is an apocalyptic number.

It is an amenable number.

133407893 is a deficient number, since it is larger than the sum of its proper divisors (1).

133407893 is an equidigital number, since it uses as much as digits as its factorization.

133407893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 133407893 is about 11550.2334608440. The cubic root of 133407893 is about 510.9681634775.

The spelling of 133407893 in words is "one hundred thirty-three million, four hundred seven thousand, eight hundred ninety-three".