111680369 has 2 divisors, whose sum is σ = 111680370. Its totient is φ = 111680368.

The previous prime is 111680353. The next prime is 111680389. The reversal of 111680369 is 963086111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105370225 + 6310144 = 10265^2 + 2512^2 .

It is a cyclic number.

It is not a de Polignac number, because 111680369 - 2⁴ = 111680353 is a prime.

It is a super-2 number, since 2×111680369² = 24945009639952322, which contains 22 as substring.

It is equal to p_6393770 and since 111680369 and 6393770 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (111680329) 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, 55840184 + 55840185.

It is an arithmetic number, because the mean of its divisors is an integer number (55840185).

Almost surely, 2^111680369 is an apocalyptic number.

It is an amenable number.

111680369 is a deficient number, since it is larger than the sum of its proper divisors (1).

111680369 is an equidigital number, since it uses as much as digits as its factorization.

111680369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 111680369 is about 10567.8933094539. The cubic root of 111680369 is about 481.5694705894.

The spelling of 111680369 in words is "one hundred eleven million, six hundred eighty thousand, three hundred sixty-nine".