3839165521 has 3 divisors (see below), whose sum is σ = 3839227483. Its totient is φ = 3839103560.

The previous prime is 3839165509. The next prime is 3839165527. The reversal of 3839165521 is 1255619383.

The square root of 3839165521 is 61961.

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 can be written as a sum of positive squares in only one way, i.e., 3374331921 + 464833600 = 58089^2 + 21560^2 .

It is not a de Polignac number, because 3839165521 - 2⁹ = 3839165009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3839165527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 30981 + ... + 92941.

Almost surely, 2^3839165521 is an apocalyptic number.

3839165521 is the 61961-st square number.

3839165521 is the 30981-st centered octagonal number.

It is an amenable number.

3839165521 is a deficient number, since it is larger than the sum of its proper divisors (61962).

3839165521 is an frugal number, since it uses more digits than its factorization.

3839165521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123922 (or 61961 counting only the distinct ones).

The product of its digits is 194400, while the sum is 43.

The cubic root of 3839165521 is about 1565.8336150958.

The spelling of 3839165521 in words is "three billion, eight hundred thirty-nine million, one hundred sixty-five thousand, five hundred twenty-one".