3945975489 has 9 divisors (see below), whose sum is σ = 5700014593. Its totient is φ = 2630524692.

The previous prime is 3945975487. The next prime is 3945975497. The reversal of 3945975489 is 9845795493.

The square root of 3945975489 is 62817.

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

3945975489 is a `hidden beast` number, since 39 + 4 + 59 + 7 + 548 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 3945975489 - 2¹ = 3945975487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3945975487) 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 8 ways as a sum of consecutive naturals, for example, 177982 + ... + 198920.

Almost surely, 2^3945975489 is an apocalyptic number.

3945975489 is the 62817-th square number.

3945975489 is the 31409-th centered octagonal number.

It is an amenable number.

3945975489 is a deficient number, since it is larger than the sum of its proper divisors (1754039104).

3945975489 is an frugal number, since it uses more digits than its factorization.

3945975489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41884 (or 20942 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 63.

The cubic root of 3945975489 is about 1580.2220871654. Note that the first 3 decimals are identical.

The spelling of 3945975489 in words is "three billion, nine hundred forty-five million, nine hundred seventy-five thousand, four hundred eighty-nine".