3897843 has 8 divisors (see below), whose sum is σ = 5208000. Its totient is φ = 2593128.

The previous prime is 3897841. The next prime is 3897853. The reversal of 3897843 is 3487983.

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

It is not a de Polignac number, because 3897843 - 2¹ = 3897841 is a prime.

3897843 is a lucky number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 3897795 and 3897804.

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 7 ways as a sum of consecutive naturals, for example, 808 + ... + 2906.

It is an arithmetic number, because the mean of its divisors is an integer number (651000).

Almost surely, 2^3897843 is an apocalyptic number.

3897843 is a deficient number, since it is larger than the sum of its proper divisors (1310157).

3897843 is a wasteful number, since it uses less digits than its factorization.

3897843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721.

The product of its digits is 145152, while the sum is 42.

The square root of 3897843 is about 1974.2955705770. The cubic root of 3897843 is about 157.3770670859.

The spelling of 3897843 in words is "three million, eight hundred ninety-seven thousand, eight hundred forty-three".