3959947 has 2 divisors, whose sum is σ = 3959948. Its totient is φ = 3959946.

The previous prime is 3959911. The next prime is 3959953. The reversal of 3959947 is 7499593.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3959947 - 2⁷ = 3959819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3959897 and 3959906.

It is not a weakly prime, because it can be changed into another prime (3959957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1979973 + 1979974.

It is an arithmetic number, because the mean of its divisors is an integer number (1979974).

Almost surely, 2^3959947 is an apocalyptic number.

3959947 is a deficient number, since it is larger than the sum of its proper divisors (1).

3959947 is an equidigital number, since it uses as much as digits as its factorization.

3959947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 46.

The square root of 3959947 is about 1989.9615574176. The cubic root of 3959947 is about 158.2084920507.

The spelling of 3959947 in words is "three million, nine hundred fifty-nine thousand, nine hundred forty-seven".