3997393 has 4 divisors (see below), whose sum is σ = 4007860. Its totient is φ = 3986928.

The previous prime is 3997381. The next prime is 3997403. The reversal of 3997393 is 3937993.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1830609 + 2166784 = 1353^2 + 1472^2 .

It is a cyclic number.

It is not a de Polignac number, because 3997393 - 2⁵ = 3997361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3997493) 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, 4638 + ... + 5431.

It is an arithmetic number, because the mean of its divisors is an integer number (1001965).

Almost surely, 2^3997393 is an apocalyptic number.

It is an amenable number.

3997393 is a deficient number, since it is larger than the sum of its proper divisors (10467).

3997393 is a wasteful number, since it uses less digits than its factorization.

3997393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10466.

The product of its digits is 137781, while the sum is 43.

The square root of 3997393 is about 1999.3481437709. The cubic root of 3997393 is about 158.7056114141.

The spelling of 3997393 in words is "three million, nine hundred ninety-seven thousand, three hundred ninety-three".