39870513 has 12 divisors (see below), whose sum is σ = 57752448. Its totient is φ = 26505720.

The previous prime is 39870451. The next prime is 39870521. The reversal of 39870513 is 31507893.

It is not a de Polignac number, because 39870513 - 2¹³ = 39862321 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39870533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2733 + ... + 9338.

It is an arithmetic number, because the mean of its divisors is an integer number (4812704).

Almost surely, 2^39870513 is an apocalyptic number.

It is an amenable number.

39870513 is a deficient number, since it is larger than the sum of its proper divisors (17881935).

39870513 is a wasteful number, since it uses less digits than its factorization.

39870513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12444 (or 12441 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 39870513 is about 6314.3101761000. The cubic root of 39870513 is about 341.6257576508.

The spelling of 39870513 in words is "thirty-nine million, eight hundred seventy thousand, five hundred thirteen".