111699 has 20 divisors (see below), whose sum is σ = 191664. Its totient is φ = 63504.

The previous prime is 111697. The next prime is 111721. The reversal of 111699 is 996111.

It is not a de Polignac number, because 111699 - 2¹ = 111697 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111697) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 469 + ... + 665.

2¹¹¹⁶⁹⁹ is an apocalyptic number.

111699 is a deficient number, since it is larger than the sum of its proper divisors (79965).

111699 is an equidigital number, since it uses as much as digits as its factorization.

111699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 207 counting only the distinct ones).

The product of its digits is 486, while the sum is 27.

The square root of 111699 is about 334.2140032973. The cubic root of 111699 is about 48.1596248265.

The spelling of 111699 in words is "one hundred eleven thousand, six hundred ninety-nine".