3947473 has 2 divisors, whose sum is σ = 3947474. Its totient is φ = 3947472.

The previous prime is 3947453. The next prime is 3947479. The reversal of 3947473 is 3747493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3069504 + 877969 = 1752^2 + 937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3947473 is a prime.

It is not a weakly prime, because it can be changed into another prime (3947479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973736 + 1973737.

It is an arithmetic number, because the mean of its divisors is an integer number (1973737).

Almost surely, 2^3947473 is an apocalyptic number.

It is an amenable number.

3947473 is a deficient number, since it is larger than the sum of its proper divisors (1).

3947473 is an equidigital number, since it uses as much as digits as its factorization.

3947473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 37.

The square root of 3947473 is about 1986.8248538812. The cubic root of 3947473 is about 158.0421961753.

The spelling of 3947473 in words is "three million, nine hundred forty-seven thousand, four hundred seventy-three".