39708909 has 12 divisors (see below), whose sum is σ = 58691776. Its totient is φ = 25856712.

The previous prime is 39708899. The next prime is 39708959. The reversal of 39708909 is 90980793.

It is a happy number.

It is not a de Polignac number, because 39708909 - 2⁹ = 39708397 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 (39708959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50917 + ... + 51690.

Almost surely, 2^39708909 is an apocalyptic number.

It is an amenable number.

39708909 is a deficient number, since it is larger than the sum of its proper divisors (18982867).

39708909 is a wasteful number, since it uses less digits than its factorization.

39708909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102656 (or 102653 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 39708909 is about 6301.5005355867. The cubic root of 39708909 is about 341.1635710757.

The spelling of 39708909 in words is "thirty-nine million, seven hundred eight thousand, nine hundred nine".