3897849 has 4 divisors (see below), whose sum is σ = 5197136. Its totient is φ = 2598564.

The previous prime is 3897841. The next prime is 3897853. The reversal of 3897849 is 9487983.

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 3897849 - 2³ = 3897841 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 3897798 and 3897807.

It is not an unprimeable number, because it can be changed into a prime (3897841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649639 + ... + 649644.

It is an arithmetic number, because the mean of its divisors is an integer number (1299284).

Almost surely, 2^3897849 is an apocalyptic number.

It is an amenable number.

3897849 is a deficient number, since it is larger than the sum of its proper divisors (1299287).

3897849 is a wasteful number, since it uses less digits than its factorization.

3897849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299286.

The product of its digits is 435456, while the sum is 48.

The square root of 3897849 is about 1974.2970901057. The cubic root of 3897849 is about 157.3771478367.

The spelling of 3897849 in words is "three million, eight hundred ninety-seven thousand, eight hundred forty-nine".