111516623 has 2 divisors, whose sum is σ = 111516624. Its totient is φ = 111516622.

The previous prime is 111516619. The next prime is 111516653. The reversal of 111516623 is 326615111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111516623 - 2² = 111516619 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 111516592 and 111516601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111516653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55758311 + 55758312.

It is an arithmetic number, because the mean of its divisors is an integer number (55758312).

Almost surely, 2^111516623 is an apocalyptic number.

111516623 is a deficient number, since it is larger than the sum of its proper divisors (1).

111516623 is an equidigital number, since it uses as much as digits as its factorization.

111516623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 111516623 is about 10560.1431334997. The cubic root of 111516623 is about 481.3339960656. Note that the first 3 decimals are identical.

The spelling of 111516623 in words is "one hundred eleven million, five hundred sixteen thousand, six hundred twenty-three".