133987849 has 2 divisors, whose sum is σ = 133987850. Its totient is φ = 133987848.

The previous prime is 133987831. The next prime is 133987853. The reversal of 133987849 is 948789331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130988025 + 2999824 = 11445^2 + 1732^2 .

It is a cyclic number.

It is not a de Polignac number, because 133987849 - 2¹⁷ = 133856777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133987796 and 133987805.

It is not a weakly prime, because it can be changed into another prime (133984849) 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, 66993924 + 66993925.

It is an arithmetic number, because the mean of its divisors is an integer number (66993925).

Almost surely, 2^133987849 is an apocalyptic number.

It is an amenable number.

133987849 is a deficient number, since it is larger than the sum of its proper divisors (1).

133987849 is an equidigital number, since it uses as much as digits as its factorization.

133987849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 133987849 is about 11575.3120476296. The cubic root of 133987849 is about 511.7075266960.

The spelling of 133987849 in words is "one hundred thirty-three million, nine hundred eighty-seven thousand, eight hundred forty-nine".