109129 has 4 divisors (see below), whose sum is σ = 110980. Its totient is φ = 107280.

The previous prime is 109121. The next prime is 109133. The reversal of 109129 is 921901.

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 51529 + 57600 = 227^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 109129 - 2³ = 109121 is a prime.

It is a Duffinian number.

109129 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (109121) 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, 834 + ... + 955.

It is an arithmetic number, because the mean of its divisors is an integer number (27745).

2¹⁰⁹¹²⁹ is an apocalyptic number.

It is an amenable number.

109129 is a deficient number, since it is larger than the sum of its proper divisors (1851).

109129 is an equidigital number, since it uses as much as digits as its factorization.

109129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 109129 is about 330.3467874825. The cubic root of 109129 is about 47.7873988597.

The spelling of 109129 in words is "one hundred nine thousand, one hundred twenty-nine".