133881685 has 8 divisors (see below), whose sum is σ = 183609216. Its totient is φ = 91804560.

The previous prime is 133881677. The next prime is 133881691. The reversal of 133881685 is 586188331.

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

It is not a de Polignac number, because 133881685 - 2³ = 133881677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1912561 + ... + 1912630.

It is an arithmetic number, because the mean of its divisors is an integer number (22951152).

Almost surely, 2^133881685 is an apocalyptic number.

It is an amenable number.

133881685 is a deficient number, since it is larger than the sum of its proper divisors (49727531).

133881685 is an equidigital number, since it uses as much as digits as its factorization.

133881685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825203.

The product of its digits is 138240, while the sum is 43.

The square root of 133881685 is about 11570.7253445927. The cubic root of 133881685 is about 511.5723421189.

The spelling of 133881685 in words is "one hundred thirty-three million, eight hundred eighty-one thousand, six hundred eighty-five".