111446981 has 2 divisors, whose sum is σ = 111446982. Its totient is φ = 111446980.

The previous prime is 111446963. The next prime is 111446999. The reversal of 111446981 is 189644111.

It is a balanced prime because it is at equal distance from previous prime (111446963) and next prime (111446999).

It can be written as a sum of positive squares in only one way, i.e., 74114881 + 37332100 = 8609^2 + 6110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111446981 is a prime.

It is a super-2 number, since 2×111446981² = 24840859148028722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111646981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55723490 + 55723491.

It is an arithmetic number, because the mean of its divisors is an integer number (55723491).

Almost surely, 2^111446981 is an apocalyptic number.

It is an amenable number.

111446981 is a deficient number, since it is larger than the sum of its proper divisors (1).

111446981 is an equidigital number, since it uses as much as digits as its factorization.

111446981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 35.

The square root of 111446981 is about 10556.8452200456. The cubic root of 111446981 is about 481.2337776957.

The spelling of 111446981 in words is "one hundred eleven million, four hundred forty-six thousand, nine hundred eighty-one".