11817983 has 2 divisors, whose sum is σ = 11817984. Its totient is φ = 11817982.

The previous prime is 11817979. The next prime is 11817997. The reversal of 11817983 is 38971811.

It is a weak prime.

It is an emirp because it is prime and its reverse (38971811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11817983 - 2² = 11817979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11817973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5908991 + 5908992.

It is an arithmetic number, because the mean of its divisors is an integer number (5908992).

Almost surely, 2^11817983 is an apocalyptic number.

11817983 is a deficient number, since it is larger than the sum of its proper divisors (1).

11817983 is an equidigital number, since it uses as much as digits as its factorization.

11817983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 38.

The square root of 11817983 is about 3437.7293378042. The cubic root of 11817983 is about 227.7794047254.

The spelling of 11817983 in words is "eleven million, eight hundred seventeen thousand, nine hundred eighty-three".