3997893 has 4 divisors (see below), whose sum is σ = 5330528. Its totient is φ = 2665260.

The previous prime is 3997891. The next prime is 3997897. The reversal of 3997893 is 3987993.

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 3997893 - 2¹ = 3997891 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997891) 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, 666313 + ... + 666318.

It is an arithmetic number, because the mean of its divisors is an integer number (1332632).

Almost surely, 2^3997893 is an apocalyptic number.

It is an amenable number.

3997893 is a deficient number, since it is larger than the sum of its proper divisors (1332635).

3997893 is a wasteful number, since it uses less digits than its factorization.

3997893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332634.

The product of its digits is 367416, while the sum is 48.

The square root of 3997893 is about 1999.4731806153. The cubic root of 3997893 is about 158.7122281847.

The spelling of 3997893 in words is "three million, nine hundred ninety-seven thousand, eight hundred ninety-three".