4939639777 has 2 divisors, whose sum is σ = 4939639778. Its totient is φ = 4939639776.

The previous prime is 4939639759. The next prime is 4939639807. The reversal of 4939639777 is 7779369394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3493282816 + 1446356961 = 59104^2 + 38031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4939639777 is a prime.

It is a super-2 number, since 2×4939639777² = 48800082253041219458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4939639717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2469819888 + 2469819889.

It is an arithmetic number, because the mean of its divisors is an integer number (2469819889).

Almost surely, 2^4939639777 is an apocalyptic number.

It is an amenable number.

4939639777 is a deficient number, since it is larger than the sum of its proper divisors (1).

4939639777 is an equidigital number, since it uses as much as digits as its factorization.

4939639777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54010152, while the sum is 64.

The square root of 4939639777 is about 70282.5709333402. The cubic root of 4939639777 is about 1703.0671017153.

The spelling of 4939639777 in words is "four billion, nine hundred thirty-nine million, six hundred thirty-nine thousand, seven hundred seventy-seven".