39504013 has 4 divisors (see below), whose sum is σ = 40778368. Its totient is φ = 38229660.

The previous prime is 39504011. The next prime is 39504077. The reversal of 39504013 is 31040593.

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.

It is a cyclic number.

It is not a de Polignac number, because 39504013 - 2¹ = 39504011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39504011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637131 + ... + 637192.

It is an arithmetic number, because the mean of its divisors is an integer number (10194592).

Almost surely, 2^39504013 is an apocalyptic number.

It is an amenable number.

39504013 is a deficient number, since it is larger than the sum of its proper divisors (1274355).

39504013 is a wasteful number, since it uses less digits than its factorization.

39504013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274354.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 39504013 is about 6285.2217940181. The cubic root of 39504013 is about 340.5757631944.

The spelling of 39504013 in words is "thirty-nine million, five hundred four thousand, thirteen".