3994279 has 2 divisors, whose sum is σ = 3994280. Its totient is φ = 3994278.

The previous prime is 3994271. The next prime is 3994357. The reversal of 3994279 is 9724993.

It is a weak prime.

It is an emirp because it is prime and its reverse (9724993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3994279 - 2³ = 3994271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3994271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997139 + 1997140.

It is an arithmetic number, because the mean of its divisors is an integer number (1997140).

Almost surely, 2^3994279 is an apocalyptic number.

3994279 is a deficient number, since it is larger than the sum of its proper divisors (1).

3994279 is an equidigital number, since it uses as much as digits as its factorization.

3994279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 3994279 is about 1998.5692382302. The cubic root of 3994279 is about 158.6643897428.

The spelling of 3994279 in words is "three million, nine hundred ninety-four thousand, two hundred seventy-nine".