133021393 has 2 divisors, whose sum is σ = 133021394. Its totient is φ = 133021392.

The previous prime is 133021387. The next prime is 133021417. The reversal of 133021393 is 393120331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119093569 + 13927824 = 10913^2 + 3732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133021393 is a prime.

It is not a weakly prime, because it can be changed into another prime (133021373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66510696 + 66510697.

It is an arithmetic number, because the mean of its divisors is an integer number (66510697).

Almost surely, 2^133021393 is an apocalyptic number.

It is an amenable number.

133021393 is a deficient number, since it is larger than the sum of its proper divisors (1).

133021393 is an equidigital number, since it uses as much as digits as its factorization.

133021393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 25.

The square root of 133021393 is about 11533.4900615555. The cubic root of 133021393 is about 510.4742391287.

The spelling of 133021393 in words is "one hundred thirty-three million, twenty-one thousand, three hundred ninety-three".