39683989 has 4 divisors (see below), whose sum is σ = 41772640. Its totient is φ = 37595340.

The previous prime is 39683939. The next prime is 39684059. The reversal of 39683989 is 98938693.

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 a de Polignac number, because none of the positive numbers 2^k-39683989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39683939) 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, 1044297 + ... + 1044334.

It is an arithmetic number, because the mean of its divisors is an integer number (10443160).

Almost surely, 2^39683989 is an apocalyptic number.

It is an amenable number.

39683989 is a deficient number, since it is larger than the sum of its proper divisors (2088651).

39683989 is a wasteful number, since it uses less digits than its factorization.

39683989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088650.

The product of its digits is 2519424, while the sum is 55.

The square root of 39683989 is about 6299.5229184439. The cubic root of 39683989 is about 341.0921884774.

The spelling of 39683989 in words is "thirty-nine million, six hundred eighty-three thousand, nine hundred eighty-nine".