111934981 has 2 divisors, whose sum is σ = 111934982. Its totient is φ = 111934980.

The previous prime is 111934943. The next prime is 111935011. The reversal of 111934981 is 189439111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60310756 + 51624225 = 7766^2 + 7185^2 .

It is a cyclic number.

It is not a de Polignac number, because 111934981 - 2⁷ = 111934853 is a prime.

It is a super-2 number, since 2×111934981² = 25058879942940722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111934981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111934931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55967490 + 55967491.

It is an arithmetic number, because the mean of its divisors is an integer number (55967491).

Almost surely, 2^111934981 is an apocalyptic number.

It is an amenable number.

111934981 is a deficient number, since it is larger than the sum of its proper divisors (1).

111934981 is an equidigital number, since it uses as much as digits as its factorization.

111934981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 37.

The square root of 111934981 is about 10579.9329392960. The cubic root of 111934981 is about 481.9351579699.

It can be divided in two parts, 1119 and 34981, that added together give a square (36100 = 190²).

The spelling of 111934981 in words is "one hundred eleven million, nine hundred thirty-four thousand, nine hundred eighty-one".