133628393 has 2 divisors, whose sum is σ = 133628394. Its totient is φ = 133628392.

The previous prime is 133628377. The next prime is 133628431. The reversal of 133628393 is 393826331.

It is an a-pointer prime, because the next prime (133628431) can be obtained adding 133628393 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83685904 + 49942489 = 9148^2 + 7067^2 .

It is a cyclic number.

It is not a de Polignac number, because 133628393 - 2⁴ = 133628377 is a prime.

It is not a weakly prime, because it can be changed into another prime (133628323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66814196 + 66814197.

It is an arithmetic number, because the mean of its divisors is an integer number (66814197).

Almost surely, 2^133628393 is an apocalyptic number.

It is an amenable number.

133628393 is a deficient number, since it is larger than the sum of its proper divisors (1).

133628393 is an equidigital number, since it uses as much as digits as its factorization.

133628393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 38.

The square root of 133628393 is about 11559.7747815431. The cubic root of 133628393 is about 511.2495223004.

The spelling of 133628393 in words is "one hundred thirty-three million, six hundred twenty-eight thousand, three hundred ninety-three".