3897447 has 8 divisors (see below), whose sum is σ = 5206656. Its totient is φ = 2593272.

The previous prime is 3897409. The next prime is 3897449. The reversal of 3897447 is 7447983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3897447 - 2⁸ = 3897191 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

3897447 is a lucky number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 3897399 and 3897408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288 + ... + 3074.

It is an arithmetic number, because the mean of its divisors is an integer number (650832).

Almost surely, 2^3897447 is an apocalyptic number.

3897447 is a deficient number, since it is larger than the sum of its proper divisors (1309209).

3897447 is a wasteful number, since it uses less digits than its factorization.

3897447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517.

The product of its digits is 169344, while the sum is 42.

The square root of 3897447 is about 1974.1952790948. The cubic root of 3897447 is about 157.3717373494.

The spelling of 3897447 in words is "three million, eight hundred ninety-seven thousand, four hundred forty-seven".