133688419 has 8 divisors (see below), whose sum is σ = 139380912. Its totient is φ = 128113440.

The previous prime is 133688381. The next prime is 133688431. The reversal of 133688419 is 914886331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133688419 is a prime.

It is a super-2 number, since 2×133688419² = 35745186749439122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133688449) 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, 27052 + ... + 31609.

It is an arithmetic number, because the mean of its divisors is an integer number (17422614).

Almost surely, 2^133688419 is an apocalyptic number.

133688419 is a deficient number, since it is larger than the sum of its proper divisors (5692493).

133688419 is an equidigital number, since it uses as much as digits as its factorization.

133688419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58757.

The product of its digits is 124416, while the sum is 43.

The square root of 133688419 is about 11562.3708209000. The cubic root of 133688419 is about 511.3260620966.

The spelling of 133688419 in words is "one hundred thirty-three million, six hundred eighty-eight thousand, four hundred nineteen".