3997243 has 4 divisors (see below), whose sum is σ = 4015080. Its totient is φ = 3979408.

The previous prime is 3997241. The next prime is 3997267. The reversal of 3997243 is 3427993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3427993 = 487 ⋅7039.

It is a cyclic number.

It is not a de Polignac number, because 3997243 - 2¹ = 3997241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3997241) 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, 8578 + ... + 9031.

It is an arithmetic number, because the mean of its divisors is an integer number (1003770).

Almost surely, 2^3997243 is an apocalyptic number.

3997243 is a deficient number, since it is larger than the sum of its proper divisors (17837).

3997243 is a wasteful number, since it uses less digits than its factorization.

3997243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17836.

The product of its digits is 40824, while the sum is 37.

The square root of 3997243 is about 1999.3106311927. The cubic root of 3997243 is about 158.7036262753.

The spelling of 3997243 in words is "three million, nine hundred ninety-seven thousand, two hundred forty-three".