112319981 has 2 divisors, whose sum is σ = 112319982. Its totient is φ = 112319980.

The previous prime is 112319957. The next prime is 112319993. The reversal of 112319981 is 189913211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77616100 + 34703881 = 8810^2 + 5891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112319981 is a prime.

It is a super-2 number, since 2×112319981² = 25231556263680722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112310981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56159990 + 56159991.

It is an arithmetic number, because the mean of its divisors is an integer number (56159991).

Almost surely, 2^112319981 is an apocalyptic number.

It is an amenable number.

112319981 is a deficient number, since it is larger than the sum of its proper divisors (1).

112319981 is an equidigital number, since it uses as much as digits as its factorization.

112319981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 35.

The square root of 112319981 is about 10598.1121432074. The cubic root of 112319981 is about 482.4870638249.

It can be divided in two parts, 11231 and 9981, that added together give a palindrome (21212).

The spelling of 112319981 in words is "one hundred twelve million, three hundred nineteen thousand, nine hundred eighty-one".