133516639 has 4 divisors (see below), whose sum is σ = 133540024. Its totient is φ = 133493256.

The previous prime is 133516631. The next prime is 133516661. The reversal of 133516639 is 936615331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936615331 = 73 ⋅12830347.

It is a cyclic number.

It is not a de Polignac number, because 133516639 - 2³ = 133516631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133516598 and 133516607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133516631) 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 3 ways as a sum of consecutive naturals, for example, 3169 + ... + 16645.

It is an arithmetic number, because the mean of its divisors is an integer number (33385006).

Almost surely, 2^133516639 is an apocalyptic number.

133516639 is a deficient number, since it is larger than the sum of its proper divisors (23385).

133516639 is an equidigital number, since it uses as much as digits as its factorization.

133516639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23384.

The product of its digits is 43740, while the sum is 37.

The square root of 133516639 is about 11554.9400258071. The cubic root of 133516639 is about 511.1069624935.

The spelling of 133516639 in words is "one hundred thirty-three million, five hundred sixteen thousand, six hundred thirty-nine".