39609913 has 4 divisors (see below), whose sum is σ = 45268480. Its totient is φ = 33951348.

The previous prime is 39609839. The next prime is 39609917. The reversal of 39609913 is 31990693.

39609913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31990693 = 7 ⋅4570099.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39609913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39609917) 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 3 ways as a sum of consecutive naturals, for example, 2829273 + ... + 2829286.

It is an arithmetic number, because the mean of its divisors is an integer number (11317120).

Almost surely, 2^39609913 is an apocalyptic number.

It is an amenable number.

39609913 is a deficient number, since it is larger than the sum of its proper divisors (5658567).

39609913 is an equidigital number, since it uses as much as digits as its factorization.

39609913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5658566.

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 39609913 is about 6293.6406792889. The cubic root of 39609913 is about 340.8798233794.

The spelling of 39609913 in words is "thirty-nine million, six hundred nine thousand, nine hundred thirteen".