11998217 has 8 divisors (see below), whose sum is σ = 14958912. Its totient is φ = 9349200.

The previous prime is 11998213. The next prime is 11998223. The reversal of 11998217 is 71289911.

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

It is not a de Polignac number, because 11998217 - 2² = 11998213 is a prime.

It is a super-2 number, since 2×11998217² = 287914422358178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11998213) 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, 77834 + ... + 77987.

It is an arithmetic number, because the mean of its divisors is an integer number (1869864).

Almost surely, 2^11998217 is an apocalyptic number.

It is an amenable number.

11998217 is a deficient number, since it is larger than the sum of its proper divisors (2960695).

11998217 is a wasteful number, since it uses less digits than its factorization.

11998217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155839.

The product of its digits is 9072, while the sum is 38.

The square root of 11998217 is about 3463.8442516949. The cubic root of 11998217 is about 228.9315089185.

The spelling of 11998217 in words is "eleven million, nine hundred ninety-eight thousand, two hundred seventeen".