133811393 has 2 divisors, whose sum is σ = 133811394. Its totient is φ = 133811392.

The previous prime is 133811389. The next prime is 133811417. The reversal of 133811393 is 393118331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72471169 + 61340224 = 8513^2 + 7832^2 .

It is a cyclic number.

It is not a de Polignac number, because 133811393 - 2² = 133811389 is a prime.

It is not a weakly prime, because it can be changed into another prime (133811333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66905696 + 66905697.

It is an arithmetic number, because the mean of its divisors is an integer number (66905697).

Almost surely, 2^133811393 is an apocalyptic number.

It is an amenable number.

133811393 is a deficient number, since it is larger than the sum of its proper divisors (1).

133811393 is an equidigital number, since it uses as much as digits as its factorization.

133811393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 32.

The square root of 133811393 is about 11567.6874525551. The cubic root of 133811393 is about 511.4827960440.

The spelling of 133811393 in words is "one hundred thirty-three million, eight hundred eleven thousand, three hundred ninety-three".