109123829 has 4 divisors (see below), whose sum is σ = 109289580. Its totient is φ = 108958080.

The previous prime is 109123823. The next prime is 109123853. The reversal of 109123829 is 928321901.

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 37332100 + 71791729 = 6110^2 + 8473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109123829 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 (109123823) 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, 81884 + ... + 83205.

It is an arithmetic number, because the mean of its divisors is an integer number (27322395).

Almost surely, 2^109123829 is an apocalyptic number.

It is an amenable number.

109123829 is a deficient number, since it is larger than the sum of its proper divisors (165751).

109123829 is an equidigital number, since it uses as much as digits as its factorization.

109123829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165750.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 109123829 is about 10446.2351591375. The cubic root of 109123829 is about 477.8664405714.

It can be divided in two parts, 10912 and 3829, that added together give a palindrome (14741).

The spelling of 109123829 in words is "one hundred nine million, one hundred twenty-three thousand, eight hundred twenty-nine".