3897943 has 4 divisors (see below), whose sum is σ = 4454800. Its totient is φ = 3341088.

The previous prime is 3897941. The next prime is 3897967. The reversal of 3897943 is 3497983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3497983 = 103 ⋅33961.

It is a cyclic number.

It is not a de Polignac number, because 3897943 - 2¹ = 3897941 is a prime.

It is an Ulam number.

3897943 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3897943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897941) 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, 278418 + ... + 278431.

It is an arithmetic number, because the mean of its divisors is an integer number (1113700).

Almost surely, 2^3897943 is an apocalyptic number.

3897943 is a deficient number, since it is larger than the sum of its proper divisors (556857).

3897943 is an equidigital number, since it uses as much as digits as its factorization.

3897943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556856.

The product of its digits is 163296, while the sum is 43.

The square root of 3897943 is about 1974.3208959032. The cubic root of 3897943 is about 157.3784129219.

The spelling of 3897943 in words is "three million, eight hundred ninety-seven thousand, nine hundred forty-three".