4939680643 has 2 divisors, whose sum is σ = 4939680644. Its totient is φ = 4939680642.

The previous prime is 4939680619. The next prime is 4939680653. The reversal of 4939680643 is 3460869394.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4939680643 is a prime.

It is not a weakly prime, because it can be changed into another prime (4939680653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2469840321 + 2469840322.

It is an arithmetic number, because the mean of its divisors is an integer number (2469840322).

Almost surely, 2^4939680643 is an apocalyptic number.

4939680643 is a deficient number, since it is larger than the sum of its proper divisors (1).

4939680643 is an equidigital number, since it uses as much as digits as its factorization.

4939680643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 52.

The square root of 4939680643 is about 70282.8616591556. The cubic root of 4939680643 is about 1703.0717982351.

The spelling of 4939680643 in words is "four billion, nine hundred thirty-nine million, six hundred eighty thousand, six hundred forty-three".