111806369 has 2 divisors, whose sum is σ = 111806370. Its totient is φ = 111806368.

The previous prime is 111806329. The next prime is 111806411. The reversal of 111806369 is 963608111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107019025 + 4787344 = 10345^2 + 2188^2 .

It is an emirp because it is prime and its reverse (963608111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111806369 - 2⁸ = 111806113 is a prime.

It is a super-2 number, since 2×111806369² = 25001328297928322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111806329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55903184 + 55903185.

It is an arithmetic number, because the mean of its divisors is an integer number (55903185).

Almost surely, 2^111806369 is an apocalyptic number.

It is an amenable number.

111806369 is a deficient number, since it is larger than the sum of its proper divisors (1).

111806369 is an equidigital number, since it uses as much as digits as its factorization.

111806369 is an evil number, because the sum of its binary digits is even.

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

The square root of 111806369 is about 10573.8530820132. The cubic root of 111806369 is about 481.7505079220.

The spelling of 111806369 in words is "one hundred eleven million, eight hundred six thousand, three hundred sixty-nine".