3897776509 has 24 divisors (see below), whose sum is σ = 4383662976. Its totient is φ = 3461858400.

The previous prime is 3897776503. The next prime is 3897776513. The reversal of 3897776509 is 9056777983.

It is not a de Polignac number, because 3897776509 - 2¹³ = 3897768317 is a prime.

It is a super-2 number, since 2×3897776509² = 30385323428224454162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897776503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1685464 + ... + 1687774.

It is an arithmetic number, because the mean of its divisors is an integer number (182652624).

Almost surely, 2^3897776509 is an apocalyptic number.

It is an amenable number.

3897776509 is a deficient number, since it is larger than the sum of its proper divisors (485886467).

3897776509 is a wasteful number, since it uses less digits than its factorization.

3897776509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649 (or 2638 counting only the distinct ones).

The product of its (nonzero) digits is 20003760, while the sum is 61.

The square root of 3897776509 is about 62432.1752704485. The cubic root of 3897776509 is about 1573.7617221338.

The spelling of 3897776509 in words is "three billion, eight hundred ninety-seven million, seven hundred seventy-six thousand, five hundred nine".