3947395147 has 2 divisors, whose sum is σ = 3947395148. Its totient is φ = 3947395146.

The previous prime is 3947395073. The next prime is 3947395169. The reversal of 3947395147 is 7415937493.

3947395147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3947395147 - 2²⁷ = 3813177419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3947395094 and 3947395103.

It is not a weakly prime, because it can be changed into another prime (3947395547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973697573 + 1973697574.

It is an arithmetic number, because the mean of its divisors is an integer number (1973697574).

Almost surely, 2^3947395147 is an apocalyptic number.

3947395147 is a deficient number, since it is larger than the sum of its proper divisors (1).

3947395147 is an equidigital number, since it uses as much as digits as its factorization.

3947395147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 52.

The square root of 3947395147 is about 62828.2989344770. The cubic root of 3947395147 is about 1580.4115718655.

The spelling of 3947395147 in words is "three billion, nine hundred forty-seven million, three hundred ninety-five thousand, one hundred forty-seven".