109238689 has 24 divisors (see below), whose sum is σ = 132169320. Its totient is φ = 89945856.

The previous prime is 109238687. The next prime is 109238713. The reversal of 109238689 is 986832901.

It can be written as a sum of positive squares in 4 ways, for example, as 57153600 + 52085089 = 7560^2 + 7217^2 .

It is not a de Polignac number, because 109238689 - 2¹ = 109238687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109238687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161019 + ... + 161695.

It is an arithmetic number, because the mean of its divisors is an integer number (5507055).

Almost surely, 2^109238689 is an apocalyptic number.

It is an amenable number.

109238689 is a deficient number, since it is larger than the sum of its proper divisors (22930631).

109238689 is an equidigital number, since it uses as much as digits as its factorization.

109238689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 109238689 is about 10451.7313876697. The cubic root of 109238689 is about 478.0340437230.

The spelling of 109238689 in words is "one hundred nine million, two hundred thirty-eight thousand, six hundred eighty-nine".