111773681 has 2 divisors, whose sum is σ = 111773682. Its totient is φ = 111773680.

The previous prime is 111773659. The next prime is 111773689. The reversal of 111773681 is 186377111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84640000 + 27133681 = 9200^2 + 5209^2 .

It is an emirp because it is prime and its reverse (186377111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111773681 - 2⁶ = 111773617 is a prime.

It is a super-2 number, since 2×111773681² = 24986711528579522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111773689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55886840 + 55886841.

It is an arithmetic number, because the mean of its divisors is an integer number (55886841).

Almost surely, 2^111773681 is an apocalyptic number.

It is an amenable number.

111773681 is a deficient number, since it is larger than the sum of its proper divisors (1).

111773681 is an equidigital number, since it uses as much as digits as its factorization.

111773681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 35.

The square root of 111773681 is about 10572.3072694658. The cubic root of 111773681 is about 481.7035547366.

The spelling of 111773681 in words is "one hundred eleven million, seven hundred seventy-three thousand, six hundred eighty-one".