111663613 has 2 divisors, whose sum is σ = 111663614. Its totient is φ = 111663612.

The previous prime is 111663571. The next prime is 111663637. The reversal of 111663613 is 316366111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79887844 + 31775769 = 8938^2 + 5637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111663613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111663683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55831806 + 55831807.

It is an arithmetic number, because the mean of its divisors is an integer number (55831807).

Almost surely, 2^111663613 is an apocalyptic number.

It is an amenable number.

111663613 is a deficient number, since it is larger than the sum of its proper divisors (1).

111663613 is an equidigital number, since it uses as much as digits as its factorization.

111663613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 111663613 is about 10567.1005010835. The cubic root of 111663613 is about 481.5453852415.

The spelling of 111663613 in words is "one hundred eleven million, six hundred sixty-three thousand, six hundred thirteen".