11999983 has 4 divisors (see below), whose sum is σ = 12007800. Its totient is φ = 11992168.

The previous prime is 11999941. The next prime is 11999987. The reversal of 11999983 is 38999911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11999983 - 2¹⁷ = 11868911 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 (11999987) 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, 760 + ... + 4957.

It is an arithmetic number, because the mean of its divisors is an integer number (3001950).

Almost surely, 2^11999983 is an apocalyptic number.

11999983 is a deficient number, since it is larger than the sum of its proper divisors (7817).

11999983 is an equidigital number, since it uses as much as digits as its factorization.

11999983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7816.

The product of its digits is 157464, while the sum is 49.

The square root of 11999983 is about 3464.0991613982. The cubic root of 11999983 is about 228.9427403987.

The spelling of 11999983 in words is "eleven million, nine hundred ninety-nine thousand, nine hundred eighty-three".