39683428849 has 3 divisors (see below), whose sum is σ = 39683628057. Its totient is φ = 39683229642.

The previous prime is 39683428819. The next prime is 39683428891. The reversal of 39683428849 is 94882438693.

The square root of 39683428849 is 199207.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 39683428849 - 2²⁹ = 39146557937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39683428819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 99604 + ... + 298810.

It is an arithmetic number, because the mean of its divisors is an integer number (13227876019).

Almost surely, 2^39683428849 is an apocalyptic number.

39683428849 is the 199207-th square number.

39683428849 is the 99604-th centered octagonal number.

It is an amenable number.

39683428849 is a deficient number, since it is larger than the sum of its proper divisors (199208).

39683428849 is an frugal number, since it uses more digits than its factorization.

39683428849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398414 (or 199207 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 64.

Multiplying 39683428849 by its sum of digits (64), we get a square (2539739446336 = 1593656²).

The spelling of 39683428849 in words is "thirty-nine billion, six hundred eighty-three million, four hundred twenty-eight thousand, eight hundred forty-nine".