3879919521 has 27 divisors (see below), whose sum is σ = 5827161171. Its totient is φ = 2583249408.

The previous prime is 3879919507. The next prime is 3879919609. The reversal of 3879919521 is 1259199783.

The square root of 3879919521 is 62289.

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

3879919521 is a `hidden beast` number, since 38 + 79 + 9 + 19 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1517959521 + 2361960000 = 38961^2 + 48600^2 .

It is a tau number, because it is divible by the number of its divisors (27).

It is not a de Polignac number, because 3879919521 - 2¹¹ = 3879917473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3879919921) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5045025 + ... + 5045793.

Almost surely, 2^3879919521 is an apocalyptic number.

3879919521 is the 62289-th square number.

3879919521 is the 31145-th centered octagonal number.

It is an amenable number.

3879919521 is a deficient number, since it is larger than the sum of its proper divisors (1947241650).

3879919521 is an frugal number, since it uses more digits than its factorization.

3879919521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562 (or 772 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The cubic root of 3879919521 is about 1571.3547370673.

The spelling of 3879919521 in words is "three billion, eight hundred seventy-nine million, nine hundred nineteen thousand, five hundred twenty-one".