39599913 has 8 divisors (see below), whose sum is σ = 52833568. Its totient is φ = 26383104.

The previous prime is 39599909. The next prime is 39599921. The reversal of 39599913 is 31999593.

It is a happy number.

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

It is not a de Polignac number, because 39599913 - 2² = 39599909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39599113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3081 + ... + 9417.

It is an arithmetic number, because the mean of its divisors is an integer number (6604196).

Almost surely, 2^39599913 is an apocalyptic number.

It is an amenable number.

39599913 is a deficient number, since it is larger than the sum of its proper divisors (13233655).

39599913 is a wasteful number, since it uses less digits than its factorization.

39599913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8423.

The product of its digits is 295245, while the sum is 48.

The square root of 39599913 is about 6292.8461764133. The cubic root of 39599913 is about 340.8511345582.

The spelling of 39599913 in words is "thirty-nine million, five hundred ninety-nine thousand, nine hundred thirteen".