133691416 has 8 divisors (see below), whose sum is σ = 250671420. Its totient is φ = 66845704.

The previous prime is 133691407. The next prime is 133691431. The reversal of 133691416 is 614196331.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8355706 + ... + 8355721.

Almost surely, 2^133691416 is an apocalyptic number.

It is an amenable number.

133691416 is a deficient number, since it is larger than the sum of its proper divisors (116980004).

133691416 is a wasteful number, since it uses less digits than its factorization.

133691416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16711433 (or 16711429 counting only the distinct ones).

The product of its digits is 11664, while the sum is 34.

The square root of 133691416 is about 11562.5004216216. The cubic root of 133691416 is about 511.3298830028.

The spelling of 133691416 in words is "one hundred thirty-three million, six hundred ninety-one thousand, four hundred sixteen".