133813839 has 8 divisors (see below), whose sum is σ = 186175872. Its totient is φ = 85330520.

The previous prime is 133813819. The next prime is 133813847. The reversal of 133813839 is 938318331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133813839 - 2⁹ = 133813327 is a prime.

It is a super-2 number, since 2×133813839² = 35812287015835842, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133813797 and 133813806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133813819) 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 7 ways as a sum of consecutive naturals, for example, 969597 + ... + 969734.

It is an arithmetic number, because the mean of its divisors is an integer number (23271984).

Almost surely, 2^133813839 is an apocalyptic number.

133813839 is a deficient number, since it is larger than the sum of its proper divisors (52362033).

133813839 is a wasteful number, since it uses less digits than its factorization.

133813839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939357.

The product of its digits is 46656, while the sum is 39.

The square root of 133813839 is about 11567.7931776117. The cubic root of 133813839 is about 511.4859125681.

The spelling of 133813839 in words is "one hundred thirty-three million, eight hundred thirteen thousand, eight hundred thirty-nine".