133197813 has 12 divisors (see below), whose sum is σ = 219882208. Its totient is φ = 76113000.

The previous prime is 133197811. The next prime is 133197821. The reversal of 133197813 is 318791331.

It is not a de Polignac number, because 133197813 - 2¹ = 133197811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133197811) 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 in 11 ways as a sum of consecutive naturals, for example, 1057063 + ... + 1057188.

Almost surely, 2^133197813 is an apocalyptic number.

It is an amenable number.

133197813 is a deficient number, since it is larger than the sum of its proper divisors (86684395).

133197813 is a wasteful number, since it uses less digits than its factorization.

133197813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114264 (or 2114261 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 133197813 is about 11541.1356893505. The cubic root of 133197813 is about 510.6998120720.

The spelling of 133197813 in words is "one hundred thirty-three million, one hundred ninety-seven thousand, eight hundred thirteen".