111642623 has 8 divisors (see below), whose sum is σ = 114237648. Its totient is φ = 109076544.

The previous prime is 111642617. The next prime is 111642637. The reversal of 111642623 is 326246111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111642623 - 2⁴ = 111642607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111642592 and 111642601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111641623) 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 in 7 ways as a sum of consecutive naturals, for example, 665 + ... + 14957.

It is an arithmetic number, because the mean of its divisors is an integer number (14279706).

Almost surely, 2^111642623 is an apocalyptic number.

111642623 is a deficient number, since it is larger than the sum of its proper divisors (2595025).

111642623 is a wasteful number, since it uses less digits than its factorization.

111642623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14473.

The product of its digits is 1728, while the sum is 26.

The square root of 111642623 is about 10566.1072775171. The cubic root of 111642623 is about 481.5152104729.

Adding to 111642623 its reverse (326246111), we get a palindrome (437888734).

The spelling of 111642623 in words is "one hundred eleven million, six hundred forty-two thousand, six hundred twenty-three".