3994423 has 4 divisors (see below), whose sum is σ = 4001128. Its totient is φ = 3987720.

The previous prime is 3994421. The next prime is 3994429. The reversal of 3994423 is 3244993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3244993 = 571 ⋅5683.

It is a cyclic number.

It is not a de Polignac number, because 3994423 - 2¹ = 3994421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994421) 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, 2361 + ... + 3682.

It is an arithmetic number, because the mean of its divisors is an integer number (1000282).

Almost surely, 2^3994423 is an apocalyptic number.

3994423 is a deficient number, since it is larger than the sum of its proper divisors (6705).

3994423 is an equidigital number, since it uses as much as digits as its factorization.

3994423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704.

The product of its digits is 23328, while the sum is 34.

The square root of 3994423 is about 1998.6052636776. The cubic root of 3994423 is about 158.6662964197. Note that the first 3 decimals are identical.

The spelling of 3994423 in words is "three million, nine hundred ninety-four thousand, four hundred twenty-three".