39664789 has 8 divisors (see below), whose sum is σ = 40461120. Its totient is φ = 38875200.

The previous prime is 39664771. The next prime is 39664817. The reversal of 39664789 is 98746693.

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

It is a cyclic number.

It is not a de Polignac number, because 39664789 - 2⁷ = 39664661 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 (39664739) 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, 11149 + ... + 14269.

It is an arithmetic number, because the mean of its divisors is an integer number (5057640).

Almost surely, 2^39664789 is an apocalyptic number.

It is an amenable number.

39664789 is a deficient number, since it is larger than the sum of its proper divisors (796331).

39664789 is a wasteful number, since it uses less digits than its factorization.

39664789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371.

The product of its digits is 1959552, while the sum is 52.

The square root of 39664789 is about 6297.9988091456. The cubic root of 39664789 is about 341.0371702644.

The spelling of 39664789 in words is "thirty-nine million, six hundred sixty-four thousand, seven hundred eighty-nine".