3897927616489 has 27 divisors (see below), whose sum is σ = 4014902606967. Its totient is φ = 3784339236528.

The previous prime is 3897927616441. The next prime is 3897927616511. The reversal of 3897927616489 is 9846167297983.

The square root of 3897927616489 is 1974317.

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

It can be written as a sum of positive squares in only one way, i.e., 2716836848089 + 1181090768400 = 1648283^2 + 1086780^2 .

It is not a de Polignac number, because 3897927616489 - 2⁹ = 3897927615977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3897927616189) 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, 12696832474 + ... + 12696832780.

Almost surely, 2^{3897927616489} is an apocalyptic number.

3897927616489 is the 1974317-th square number.

3897927616489 is the 987159-th centered octagonal number.

It is an amenable number.

3897927616489 is a deficient number, since it is larger than the sum of its proper divisors (116974990478).

3897927616489 is an frugal number, since it uses more digits than its factorization.

3897927616489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950 (or 475 counting only the distinct ones).

The product of its digits is 1975228416, while the sum is 79.

The spelling of 3897927616489 in words is "three trillion, eight hundred ninety-seven billion, nine hundred twenty-seven million, six hundred sixteen thousand, four hundred eighty-nine".