111111111983 has 2 divisors, whose sum is σ = 111111111984. Its totient is φ = 111111111982.

The previous prime is 111111111977. The next prime is 111111112097. The reversal of 111111111983 is 389111111111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111111111983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111111383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555555991 + 55555555992.

It is an arithmetic number, because the mean of its divisors is an integer number (55555555992).

Almost surely, 2^111111111983 is an apocalyptic number.

111111111983 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111111983 is an equidigital number, since it uses as much as digits as its factorization.

111111111983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 29.

The spelling of 111111111983 in words is "one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, nine hundred eighty-three".