133681608239 has 4 divisors (see below), whose sum is σ = 136525897824. Its totient is φ = 130837318656.

The previous prime is 133681608217. The next prime is 133681608253. The reversal of 133681608239 is 932806186331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133681608239 - 2¹² = 133681604143 is a prime.

It is a super-2 number, since 2×133681608239² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133681608209) 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, 1422144722 + ... + 1422144815.

It is an arithmetic number, because the mean of its divisors is an integer number (34131474456).

Almost surely, 2^133681608239 is an apocalyptic number.

133681608239 is a deficient number, since it is larger than the sum of its proper divisors (2844289585).

133681608239 is an equidigital number, since it uses as much as digits as its factorization.

133681608239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844289584.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 133681608239 in words is "one hundred thirty-three billion, six hundred eighty-one million, six hundred eight thousand, two hundred thirty-nine".