133820689 has 2 divisors, whose sum is σ = 133820690. Its totient is φ = 133820688.

The previous prime is 133820683. The next prime is 133820711. The reversal of 133820689 is 986028331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90155025 + 43665664 = 9495^2 + 6608^2 .

It is a cyclic number.

It is not a de Polignac number, because 133820689 - 2¹⁷ = 133689617 is a prime.

It is not a weakly prime, because it can be changed into another prime (133820683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66910344 + 66910345.

It is an arithmetic number, because the mean of its divisors is an integer number (66910345).

Almost surely, 2^133820689 is an apocalyptic number.

It is an amenable number.

133820689 is a deficient number, since it is larger than the sum of its proper divisors (1).

133820689 is an equidigital number, since it uses as much as digits as its factorization.

133820689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 133820689 is about 11568.0892544966. The cubic root of 133820689 is about 511.4946401624.

The spelling of 133820689 in words is "one hundred thirty-three million, eight hundred twenty thousand, six hundred eighty-nine".