3940393 has 4 divisors (see below), whose sum is σ = 3957120. Its totient is φ = 3923668.

The previous prime is 3940381. The next prime is 3940397. The reversal of 3940393 is 3930493.

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 a cyclic number.

It is not a de Polignac number, because 3940393 - 2¹⁷ = 3809321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3940397) 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, 8005 + ... + 8482.

It is an arithmetic number, because the mean of its divisors is an integer number (989280).

Almost surely, 2^3940393 is an apocalyptic number.

It is an amenable number.

3940393 is a deficient number, since it is larger than the sum of its proper divisors (16727).

3940393 is a wasteful number, since it uses less digits than its factorization.

3940393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16726.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 3940393 is about 1985.0423169293. The cubic root of 3940393 is about 157.9476539728.

The spelling of 3940393 in words is "three million, nine hundred forty thousand, three hundred ninety-three".