111405673 has 2 divisors, whose sum is σ = 111405674. Its totient is φ = 111405672.

The previous prime is 111405659. The next prime is 111405677. The reversal of 111405673 is 376504111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111239209 + 166464 = 10547^2 + 408^2 .

It is an emirp because it is prime and its reverse (376504111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111405673 - 2¹⁷ = 111274601 is a prime.

It is a super-2 number, since 2×111405673² = 24822447953165858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111405677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55702836 + 55702837.

It is an arithmetic number, because the mean of its divisors is an integer number (55702837).

Almost surely, 2^111405673 is an apocalyptic number.

It is an amenable number.

111405673 is a deficient number, since it is larger than the sum of its proper divisors (1).

111405673 is an equidigital number, since it uses as much as digits as its factorization.

111405673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 111405673 is about 10554.8885830216. Note that the first 3 decimals coincide. The cubic root of 111405673 is about 481.1743136610.

Adding to 111405673 its reverse (376504111), we get a palindrome (487909784).

The spelling of 111405673 in words is "one hundred eleven million, four hundred five thousand, six hundred seventy-three".