111603643 has 2 divisors, whose sum is σ = 111603644. Its totient is φ = 111603642.

The previous prime is 111603631. The next prime is 111603649. The reversal of 111603643 is 346306111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111603643 - 2²⁵ = 78049211 is a prime.

It is not a weakly prime, because it can be changed into another prime (111603649) 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, 55801821 + 55801822.

It is an arithmetic number, because the mean of its divisors is an integer number (55801822).

Almost surely, 2^111603643 is an apocalyptic number.

111603643 is a deficient number, since it is larger than the sum of its proper divisors (1).

111603643 is an equidigital number, since it uses as much as digits as its factorization.

111603643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 111603643 is about 10564.2625393352. The cubic root of 111603643 is about 481.4591636356.

Adding to 111603643 its reverse (346306111), we get a palindrome (457909754).

The spelling of 111603643 in words is "one hundred eleven million, six hundred three thousand, six hundred forty-three".