39705987 has 8 divisors (see below), whose sum is σ = 52999936. Its totient is φ = 26441352.

The previous prime is 39705979. The next prime is 39706001. The reversal of 39705987 is 78950793.

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

It is not a de Polignac number, because 39705987 - 2³ = 39705979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39705977) 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, 3943 + ... + 9744.

It is an arithmetic number, because the mean of its divisors is an integer number (6624992).

Almost surely, 2^39705987 is an apocalyptic number.

39705987 is a deficient number, since it is larger than the sum of its proper divisors (13293949).

39705987 is a wasteful number, since it uses less digits than its factorization.

39705987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14657.

The product of its (nonzero) digits is 476280, while the sum is 48.

The square root of 39705987 is about 6301.2686817815. The cubic root of 39705987 is about 341.1552026395.

The spelling of 39705987 in words is "thirty-nine million, seven hundred five thousand, nine hundred eighty-seven".