111965641 has 2 divisors, whose sum is σ = 111965642. Its totient is φ = 111965640.

The previous prime is 111965617. The next prime is 111965681. The reversal of 111965641 is 146569111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111936400 + 29241 = 10580^2 + 171^2 .

It is a cyclic number.

It is not a de Polignac number, because 111965641 - 2⁹ = 111965129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111965597 and 111965606.

It is not a weakly prime, because it can be changed into another prime (111965681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55982820 + 55982821.

It is an arithmetic number, because the mean of its divisors is an integer number (55982821).

Almost surely, 2^111965641 is an apocalyptic number.

It is an amenable number.

111965641 is a deficient number, since it is larger than the sum of its proper divisors (1).

111965641 is an equidigital number, since it uses as much as digits as its factorization.

111965641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 34.

The square root of 111965641 is about 10581.3818095748. The cubic root of 111965641 is about 481.9791560805.

The spelling of 111965641 in words is "one hundred eleven million, nine hundred sixty-five thousand, six hundred forty-one".