133746391 has 2 divisors, whose sum is σ = 133746392. Its totient is φ = 133746390.

The previous prime is 133746373. The next prime is 133746419. The reversal of 133746391 is 193647331.

It is a weak prime.

It is an emirp because it is prime and its reverse (193647331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133746391 - 2¹¹ = 133744343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133746391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133746091) 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, 66873195 + 66873196.

It is an arithmetic number, because the mean of its divisors is an integer number (66873196).

Almost surely, 2^133746391 is an apocalyptic number.

133746391 is a deficient number, since it is larger than the sum of its proper divisors (1).

133746391 is an equidigital number, since it uses as much as digits as its factorization.

133746391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 37.

The square root of 133746391 is about 11564.8774744915. The cubic root of 133746391 is about 511.3999610701.

The spelling of 133746391 in words is "one hundred thirty-three million, seven hundred forty-six thousand, three hundred ninety-one".