133968697 has 2 divisors, whose sum is σ = 133968698. Its totient is φ = 133968696.

The previous prime is 133968691. The next prime is 133968707. The reversal of 133968697 is 796869331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133888041 + 80656 = 11571^2 + 284^2 .

It is an emirp because it is prime and its reverse (796869331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133968697 is a prime.

It is a super-2 number, since 2×133968697² = 35895223551755618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133968691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66984348 + 66984349.

It is an arithmetic number, because the mean of its divisors is an integer number (66984349).

Almost surely, 2^133968697 is an apocalyptic number.

It is an amenable number.

133968697 is a deficient number, since it is larger than the sum of its proper divisors (1).

133968697 is an equidigital number, since it uses as much as digits as its factorization.

133968697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 52.

The square root of 133968697 is about 11574.4847401515. The cubic root of 133968697 is about 511.6831446604.

The spelling of 133968697 in words is "one hundred thirty-three million, nine hundred sixty-eight thousand, six hundred ninety-seven".