133704217 has 4 divisors (see below), whose sum is σ = 133874896. Its totient is φ = 133533540.

The previous prime is 133704163. The next prime is 133704223. The reversal of 133704217 is 712407331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712407331 = 10151 ⋅70181.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133704217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133704317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84159 + ... + 85732.

It is an arithmetic number, because the mean of its divisors is an integer number (33468724).

Almost surely, 2^133704217 is an apocalyptic number.

It is an amenable number.

133704217 is a deficient number, since it is larger than the sum of its proper divisors (170679).

133704217 is an equidigital number, since it uses as much as digits as its factorization.

133704217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170678.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 133704217 is about 11563.0539651080. The cubic root of 133704217 is about 511.3462024872.

The spelling of 133704217 in words is "one hundred thirty-three million, seven hundred four thousand, two hundred seventeen".