111623 has 2 divisors, whose sum is σ = 111624. Its totient is φ = 111622.

The previous prime is 111611. The next prime is 111637. The reversal of 111623 is 326111.

It is an a-pointer prime, because the next prime (111637) can be obtained adding 111623 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111623 - 2¹⁴ = 95239 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 111598 and 111607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55811 + 55812.

It is an arithmetic number, because the mean of its divisors is an integer number (55812).

2¹¹¹⁶²³ is an apocalyptic number.

111623 is a deficient number, since it is larger than the sum of its proper divisors (1).

111623 is an equidigital number, since it uses as much as digits as its factorization.

111623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 14.

The square root of 111623 is about 334.1002843459. The cubic root of 111623 is about 48.1486997453.

Adding to 111623 its reverse (326111), we get a palindrome (437734).

The spelling of 111623 in words is "one hundred eleven thousand, six hundred twenty-three".