109699 has 4 divisors (see below), whose sum is σ = 110536. Its totient is φ = 108864.

The previous prime is 109673. The next prime is 109717. The reversal of 109699 is 996901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 996901 = 79 ⋅12619.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109609) 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, 174 + ... + 499.

It is an arithmetic number, because the mean of its divisors is an integer number (27634).

2¹⁰⁹⁶⁹⁹ is an apocalyptic number.

109699 is a deficient number, since it is larger than the sum of its proper divisors (837).

109699 is an equidigital number, since it uses as much as digits as its factorization.

109699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 109699 is about 331.2083936134. The cubic root of 109699 is about 47.8704550901.

It can be divided in two parts, 109 and 699, that added together give a palindrome (808).

The spelling of 109699 in words is "one hundred nine thousand, six hundred ninety-nine".