4947791 has 2 divisors, whose sum is σ = 4947792. Its totient is φ = 4947790.

The previous prime is 4947779. The next prime is 4947797. The reversal of 4947791 is 1977494.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4947791 - 2⁶ = 4947727 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4947797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2473895 + 2473896.

It is an arithmetic number, because the mean of its divisors is an integer number (2473896).

Almost surely, 2^4947791 is an apocalyptic number.

4947791 is a deficient number, since it is larger than the sum of its proper divisors (1).

4947791 is an equidigital number, since it uses as much as digits as its factorization.

4947791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 4947791 is about 2224.3630548991. The cubic root of 4947791 is about 170.4003367748.

The spelling of 4947791 in words is "four million, nine hundred forty-seven thousand, seven hundred ninety-one".