3979447 has 4 divisors (see below), whose sum is σ = 3983616. Its totient is φ = 3975280.

The previous prime is 3979433. The next prime is 3979463. The reversal of 3979447 is 7449793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3979447 - 2¹⁹ = 3455159 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3979427) 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, 138 + ... + 2824.

It is an arithmetic number, because the mean of its divisors is an integer number (995904).

Almost surely, 2^3979447 is an apocalyptic number.

3979447 is a deficient number, since it is larger than the sum of its proper divisors (4169).

3979447 is a wasteful number, since it uses less digits than its factorization.

3979447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168.

The product of its digits is 190512, while the sum is 43.

The square root of 3979447 is about 1994.8551325848. The cubic root of 3979447 is about 158.4677560817.

The spelling of 3979447 in words is "three million, nine hundred seventy-nine thousand, four hundred forty-seven".