3939696289 has 9 divisors (see below), whose sum is σ = 4119944563. Its totient is φ = 3767024272.

The previous prime is 3939696221. The next prime is 3939696301. The reversal of 3939696289 is 9826969393.

The square root of 3939696289 is 62767.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3796654689 + 143041600 = 61617^2 + 11960^2 .

It is not a de Polignac number, because 3939696289 - 2⁹ = 3939695777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3939696289.

It is not an unprimeable number, because it can be changed into a prime (3939696589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1442277 + ... + 1445005.

Almost surely, 2^3939696289 is an apocalyptic number.

3939696289 is the 62767-th square number.

3939696289 is the 31384-th centered octagonal number.

It is an amenable number.

3939696289 is a deficient number, since it is larger than the sum of its proper divisors (180248274).

3939696289 is an frugal number, since it uses more digits than its factorization.

3939696289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5504 (or 2752 counting only the distinct ones).

The product of its digits is 34012224, while the sum is 64.

The cubic root of 3939696289 is about 1579.3834438075.

Multiplying 3939696289 by its sum of digits (64), we get a square (252140562496 = 502136²).

The spelling of 3939696289 in words is "three billion, nine hundred thirty-nine million, six hundred ninety-six thousand, two hundred eighty-nine".