133902217 has 8 divisors (see below), whose sum is σ = 141958656. Its totient is φ = 125865792.

The previous prime is 133902179. The next prime is 133902227. The reversal of 133902217 is 712209331.

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-133902217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133902227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10108 + ... + 19234.

It is an arithmetic number, because the mean of its divisors is an integer number (17744832).

Almost surely, 2^133902217 is an apocalyptic number.

133902217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

133902217 is a deficient number, since it is larger than the sum of its proper divisors (8056439).

133902217 is an equidigital number, since it uses as much as digits as its factorization.

133902217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10007.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 133902217 is about 11571.6125496838. The cubic root of 133902217 is about 511.5984922390.

The spelling of 133902217 in words is "one hundred thirty-three million, nine hundred two thousand, two hundred seventeen".