11998917 has 24 divisors (see below), whose sum is σ = 19907264. Its totient is φ = 6822144.

The previous prime is 11998859. The next prime is 11998927. The reversal of 11998917 is 71989911.

It is not a de Polignac number, because 11998917 - 2⁸ = 11998661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11998927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17493 + ... + 18165.

Almost surely, 2^11998917 is an apocalyptic number.

It is an amenable number.

11998917 is a deficient number, since it is larger than the sum of its proper divisors (7908347).

11998917 is a wasteful number, since it uses less digits than its factorization.

11998917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969 (or 966 counting only the distinct ones).

The product of its digits is 40824, while the sum is 45.

The square root of 11998917 is about 3463.9452940253. The cubic root of 11998917 is about 228.9359609394.

The spelling of 11998917 in words is "eleven million, nine hundred ninety-eight thousand, nine hundred seventeen".