109553 has 4 divisors (see below), whose sum is σ = 111168. Its totient is φ = 107940.

The previous prime is 109547. The next prime is 109567. The reversal of 109553 is 355901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 109553 - 2⁴ = 109537 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 (109583) 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, 701 + ... + 842.

It is an arithmetic number, because the mean of its divisors is an integer number (27792).

2¹⁰⁹⁵⁵³ is an apocalyptic number.

It is an amenable number.

109553 is a deficient number, since it is larger than the sum of its proper divisors (1615).

109553 is an equidigital number, since it uses as much as digits as its factorization.

109553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 109553 is about 330.9879151872. The cubic root of 109553 is about 47.8492084991.

The spelling of 109553 in words is "one hundred nine thousand, five hundred fifty-three".