133652681 has 2 divisors, whose sum is σ = 133652682. Its totient is φ = 133652680.

The previous prime is 133652581. The next prime is 133652683. The reversal of 133652681 is 186256331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75968656 + 57684025 = 8716^2 + 7595^2 .

It is an emirp because it is prime and its reverse (186256331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133652681 - 2²² = 129458377 is a prime.

It is a super-2 number, since 2×133652681² = 35726078276975522, which contains 22 as substring.

Together with 133652683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133652683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66826340 + 66826341.

It is an arithmetic number, because the mean of its divisors is an integer number (66826341).

Almost surely, 2^133652681 is an apocalyptic number.

It is an amenable number.

133652681 is a deficient number, since it is larger than the sum of its proper divisors (1).

133652681 is an equidigital number, since it uses as much as digits as its factorization.

133652681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 133652681 is about 11560.8252733099. The cubic root of 133652681 is about 511.2804949499.

The spelling of 133652681 in words is "one hundred thirty-three million, six hundred fifty-two thousand, six hundred eighty-one".