39979585 has 4 divisors (see below), whose sum is σ = 47975508. Its totient is φ = 31983664.

The previous prime is 39979571. The next prime is 39979613. The reversal of 39979585 is 58597993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19395216 + 20584369 = 4404^2 + 4537^2 .

It is a cyclic number.

It is not a de Polignac number, because 39979585 - 2⁹ = 39979073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3997954 + ... + 3997963.

It is an arithmetic number, because the mean of its divisors is an integer number (11993877).

Almost surely, 2^39979585 is an apocalyptic number.

It is an amenable number.

39979585 is a deficient number, since it is larger than the sum of its proper divisors (7995923).

39979585 is an equidigital number, since it uses as much as digits as its factorization.

39979585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7995922.

The product of its digits is 3061800, while the sum is 55.

The square root of 39979585 is about 6322.9411668938. The cubic root of 39979585 is about 341.9369975027.

The spelling of 39979585 in words is "thirty-nine million, nine hundred seventy-nine thousand, five hundred eighty-five".