133791197 has 2 divisors, whose sum is σ = 133791198. Its totient is φ = 133791196.

The previous prime is 133791157. The next prime is 133791199. The reversal of 133791197 is 791197331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115906756 + 17884441 = 10766^2 + 4229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133791197 is a prime.

Together with 133791199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133791199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66895598 + 66895599.

It is an arithmetic number, because the mean of its divisors is an integer number (66895599).

Almost surely, 2^133791197 is an apocalyptic number.

It is an amenable number.

133791197 is a deficient number, since it is larger than the sum of its proper divisors (1).

133791197 is an equidigital number, since it uses as much as digits as its factorization.

133791197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35721, while the sum is 41.

The square root of 133791197 is about 11566.8144707175. The cubic root of 133791197 is about 511.4570622454.

The spelling of 133791197 in words is "one hundred thirty-three million, seven hundred ninety-one thousand, one hundred ninety-seven".