111603997 has 6 divisors (see below), whose sum is σ = 118555418. Its totient is φ = 105038784.

The previous prime is 111603979. The next prime is 111604001. The reversal of 111603997 is 799306111.

It can be written as a sum of positive squares in 3 ways, for example, as 70207641 + 41396356 = 8379^2 + 6434^2 .

It is a de Polignac number, because none of the positive numbers 2^k-111603997 is a prime.

It is a super-3 number, since 3×111603997³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111603197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 192798 + ... + 193375.

Almost surely, 2^111603997 is an apocalyptic number.

111603997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

111603997 is a deficient number, since it is larger than the sum of its proper divisors (6951421).

111603997 is an equidigital number, since it uses as much as digits as its factorization.

111603997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386207 (or 386190 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 111603997 is about 10564.2792939225. The cubic root of 111603997 is about 481.4596726882.

The spelling of 111603997 in words is "one hundred eleven million, six hundred three thousand, nine hundred ninety-seven".