133690817 has 8 divisors (see below), whose sum is σ = 148619520. Its totient is φ = 119425680.

The previous prime is 133690793. The next prime is 133690849. The reversal of 133690817 is 718096331.

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 133690817 - 2¹⁰ = 133689793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133690867) 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, 165467 + ... + 166272.

It is an arithmetic number, because the mean of its divisors is an integer number (18577440).

Almost surely, 2^133690817 is an apocalyptic number.

It is an amenable number.

133690817 is a deficient number, since it is larger than the sum of its proper divisors (14928703).

133690817 is a wasteful number, since it uses less digits than its factorization.

133690817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331783.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 133690817 is about 11562.4745188908. The cubic root of 133690817 is about 511.3291193361.

The spelling of 133690817 in words is "one hundred thirty-three million, six hundred ninety thousand, eight hundred seventeen".