3993457 has 4 divisors (see below), whose sum is σ = 4300660. Its totient is φ = 3686256.

The previous prime is 3993443. The next prime is 3993469. The reversal of 3993457 is 7543993.

3993457 is nontrivially palindromic in base 12.

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 1201216 + 2792241 = 1096^2 + 1671^2 .

It is a cyclic number.

It is not a de Polignac number, because 3993457 - 2¹⁵ = 3960689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3993427) 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, 153582 + ... + 153607.

It is an arithmetic number, because the mean of its divisors is an integer number (1075165).

Almost surely, 2^3993457 is an apocalyptic number.

It is an amenable number.

3993457 is a deficient number, since it is larger than the sum of its proper divisors (307203).

3993457 is a wasteful number, since it uses less digits than its factorization.

3993457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307202.

The product of its digits is 102060, while the sum is 40.

The square root of 3993457 is about 1998.3635805328. The cubic root of 3993457 is about 158.6535049185.

The spelling of 3993457 in words is "three million, nine hundred ninety-three thousand, four hundred fifty-seven".