133696391 has 2 divisors, whose sum is σ = 133696392. Its totient is φ = 133696390.

The previous prime is 133696379. The next prime is 133696403. The reversal of 133696391 is 193696331.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (133696379) and next prime (133696403).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133696391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133696091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66848195 + 66848196.

It is an arithmetic number, because the mean of its divisors is an integer number (66848196).

Almost surely, 2^133696391 is an apocalyptic number.

133696391 is a deficient number, since it is larger than the sum of its proper divisors (1).

133696391 is an equidigital number, since it uses as much as digits as its factorization.

133696391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78732, while the sum is 41.

The square root of 133696391 is about 11562.7155547475. The cubic root of 133696391 is about 511.3362255557.

The spelling of 133696391 in words is "one hundred thirty-three million, six hundred ninety-six thousand, three hundred ninety-one".