39687005 has 8 divisors (see below), whose sum is σ = 47668824. Its totient is φ = 31720000.

The previous prime is 39687001. The next prime is 39687007. The reversal of 39687005 is 50078693.

It can be written as a sum of positive squares in 4 ways, for example, as 9604 + 39677401 = 98^2 + 6299^2 .

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

It is not a de Polignac number, because 39687005 - 2² = 39687001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39687005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39687001) 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, 3455 + ... + 9555.

It is an arithmetic number, because the mean of its divisors is an integer number (5958603).

Almost surely, 2^39687005 is an apocalyptic number.

It is an amenable number.

39687005 is a deficient number, since it is larger than the sum of its proper divisors (7981819).

39687005 is a wasteful number, since it uses less digits than its factorization.

39687005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7407.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 39687005 is about 6299.7622971030. The cubic root of 39687005 is about 341.1008293089.

The spelling of 39687005 in words is "thirty-nine million, six hundred eighty-seven thousand, five".