11998863 has 12 divisors (see below), whose sum is σ = 17377360. Its totient is φ = 7978176.

The previous prime is 11998859. The next prime is 11998927. The reversal of 11998863 is 36889911.

It is not a de Polignac number, because 11998863 - 2² = 11998859 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 (11998813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2358 + ... + 5436.

Almost surely, 2^11998863 is an apocalyptic number.

11998863 is a deficient number, since it is larger than the sum of its proper divisors (5378497).

11998863 is a wasteful number, since it uses less digits than its factorization.

11998863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518 (or 3515 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 11998863 is about 3463.9374994362. The cubic root of 11998863 is about 228.9356175040.

The spelling of 11998863 in words is "eleven million, nine hundred ninety-eight thousand, eight hundred sixty-three".