109385639 has 16 divisors (see below), whose sum is σ = 124486656. Its totient is φ = 95212800.

The previous prime is 109385623. The next prime is 109385669. The reversal of 109385639 is 936583901.

It is a cyclic number.

It is not a de Polignac number, because 109385639 - 2⁴ = 109385623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109385639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109385669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31424 + ... + 34730.

It is an arithmetic number, because the mean of its divisors is an integer number (7780416).

Almost surely, 2^109385639 is an apocalyptic number.

109385639 is a deficient number, since it is larger than the sum of its proper divisors (15101017).

109385639 is a wasteful number, since it uses less digits than its factorization.

109385639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 109385639 is about 10458.7589607945. The cubic root of 109385639 is about 478.2483012283.

The spelling of 109385639 in words is "one hundred nine million, three hundred eighty-five thousand, six hundred thirty-nine".