4939391 has 2 divisors, whose sum is σ = 4939392. Its totient is φ = 4939390.

The previous prime is 4939387. The next prime is 4939423. The reversal of 4939391 is 1939394.

4939391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4939391 - 2² = 4939387 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 (4939331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2469695 + 2469696.

It is an arithmetic number, because the mean of its divisors is an integer number (2469696).

Almost surely, 2^4939391 is an apocalyptic number.

4939391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4939391 is an equidigital number, since it uses as much as digits as its factorization.

4939391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 38.

The square root of 4939391 is about 2222.4740718398. The cubic root of 4939391 is about 170.3038510492.

The spelling of 4939391 in words is "four million, nine hundred thirty-nine thousand, three hundred ninety-one".