11663899 has 4 divisors (see below), whose sum is σ = 12561136. Its totient is φ = 10766664.

The previous prime is 11663893. The next prime is 11663909. The reversal of 11663899 is 99836611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11663899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11663893) 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, 448599 + ... + 448624.

It is an arithmetic number, because the mean of its divisors is an integer number (3140284).

Almost surely, 2^11663899 is an apocalyptic number.

11663899 is a deficient number, since it is larger than the sum of its proper divisors (897237).

11663899 is an equidigital number, since it uses as much as digits as its factorization.

11663899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897236.

The product of its digits is 69984, while the sum is 43.

The square root of 11663899 is about 3415.2450863737. The cubic root of 11663899 is about 226.7851343906.

The spelling of 11663899 in words is "eleven million, six hundred sixty-three thousand, eight hundred ninety-nine".