3995447 has 2 divisors, whose sum is σ = 3995448. Its totient is φ = 3995446.

The previous prime is 3995443. The next prime is 3995449. The reversal of 3995447 is 7445993.

It is a strong prime.

It is an emirp because it is prime and its reverse (7445993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3995447 - 2² = 3995443 is a prime.

Together with 3995449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3995441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997723 + 1997724.

It is an arithmetic number, because the mean of its divisors is an integer number (1997724).

Almost surely, 2^3995447 is an apocalyptic number.

3995447 is a deficient number, since it is larger than the sum of its proper divisors (1).

3995447 is an equidigital number, since it uses as much as digits as its factorization.

3995447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 3995447 is about 1998.8614259123. The cubic root of 3995447 is about 158.6798536890.

The spelling of 3995447 in words is "three million, nine hundred ninety-five thousand, four hundred forty-seven".