39909689 has 8 divisors (see below), whose sum is σ = 41273280. Its totient is φ = 38568816.

The previous prime is 39909629. The next prime is 39909703. The reversal of 39909689 is 98690993.

39909689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39909689 - 2²⁰ = 38861113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

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 39909689.

It is not an unprimeable number, because it can be changed into a prime (39909619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2069 + ... + 9170.

It is an arithmetic number, because the mean of its divisors is an integer number (5159160).

Almost surely, 2^39909689 is an apocalyptic number.

It is an amenable number.

39909689 is a deficient number, since it is larger than the sum of its proper divisors (1363591).

39909689 is a wasteful number, since it uses less digits than its factorization.

39909689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11359.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 39909689 is about 6317.4115743713. The cubic root of 39909689 is about 341.7376126584.

The spelling of 39909689 in words is "thirty-nine million, nine hundred nine thousand, six hundred eighty-nine".