111623969 has 4 divisors (see below), whose sum is σ = 112292544. Its totient is φ = 110955396.

The previous prime is 111623959. The next prime is 111623977. The reversal of 111623969 is 969326111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111623969 - 2²⁴ = 94846753 is a prime.

It is a super-2 number, since 2×111623969² = 24919820910625922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111623909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334037 + ... + 334370.

It is an arithmetic number, because the mean of its divisors is an integer number (28073136).

Almost surely, 2^111623969 is an apocalyptic number.

It is an amenable number.

111623969 is a deficient number, since it is larger than the sum of its proper divisors (668575).

111623969 is an equidigital number, since it uses as much as digits as its factorization.

111623969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668574.

The product of its digits is 17496, while the sum is 38.

The square root of 111623969 is about 10565.2245125222. The cubic root of 111623969 is about 481.4883907130.

The spelling of 111623969 in words is "one hundred eleven million, six hundred twenty-three thousand, nine hundred sixty-nine".