3866512989 has 4 divisors (see below), whose sum is σ = 5155350656. Its totient is φ = 2577675324.

The previous prime is 3866512981. The next prime is 3866513009. The reversal of 3866512989 is 9892156683.

3866512989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3866512989 - 2³ = 3866512981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3866512981) 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 3 ways as a sum of consecutive naturals, for example, 644418829 + ... + 644418834.

It is an arithmetic number, because the mean of its divisors is an integer number (1288837664).

Almost surely, 2^3866512989 is an apocalyptic number.

It is an amenable number.

3866512989 is a deficient number, since it is larger than the sum of its proper divisors (1288837667).

3866512989 is a wasteful number, since it uses less digits than its factorization.

3866512989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288837666.

The product of its digits is 5598720, while the sum is 57.

The square root of 3866512989 is about 62181.2913101682. The cubic root of 3866512989 is about 1569.5427812453.

The spelling of 3866512989 in words is "three billion, eight hundred sixty-six million, five hundred twelve thousand, nine hundred eighty-nine".