109997 has 4 divisors (see below), whose sum is σ = 113820. Its totient is φ = 106176.

The previous prime is 109987. The next prime is 110017. The reversal of 109997 is 799901.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37636 + 72361 = 194^2 + 269^2 .

It is a cyclic number.

It is not a de Polignac number, because 109997 - 2⁸ = 109741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1868 + ... + 1925.

It is an arithmetic number, because the mean of its divisors is an integer number (28455).

2¹⁰⁹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

109997 is a deficient number, since it is larger than the sum of its proper divisors (3823).

109997 is an equidigital number, since it uses as much as digits as its factorization.

109997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 109997 is about 331.6579563345. The cubic root of 109997 is about 47.9137629830.

The spelling of 109997 in words is "one hundred nine thousand, nine hundred ninety-seven".