133686351 has 12 divisors (see below), whose sum is σ = 204461712. Its totient is φ = 83881536.

The previous prime is 133686349. The next prime is 133686359. The reversal of 133686351 is 153686331.

It is a happy number.

133686351 is a `hidden beast` number, since 13 + 3 + 6 + 8 + 635 + 1 = 666.

It is not a de Polignac number, because 133686351 - 2¹ = 133686349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133686359) 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 11 ways as a sum of consecutive naturals, for example, 436731 + ... + 437036.

It is an arithmetic number, because the mean of its divisors is an integer number (17038476).

Almost surely, 2^133686351 is an apocalyptic number.

133686351 is a deficient number, since it is larger than the sum of its proper divisors (70775361).

133686351 is a wasteful number, since it uses less digits than its factorization.

133686351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873790 (or 873787 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 133686351 is about 11562.2813925280. The cubic root of 133686351 is about 511.3234255487.

The spelling of 133686351 in words is "one hundred thirty-three million, six hundred eighty-six thousand, three hundred fifty-one".