7720433939 has 2 divisors, whose sum is σ = 7720433940. Its totient is φ = 7720433938.

The previous prime is 7720433927. The next prime is 7720433971. The reversal of 7720433939 is 9393340277.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7720433939 - 2⁸ = 7720433683 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 7720433893 and 7720433902.

It is not a weakly prime, because it can be changed into another prime (7720433339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860216969 + 3860216970.

It is an arithmetic number, because the mean of its divisors is an integer number (3860216970).

Almost surely, 2^7720433939 is an apocalyptic number.

7720433939 is a deficient number, since it is larger than the sum of its proper divisors (1).

7720433939 is an equidigital number, since it uses as much as digits as its factorization.

7720433939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 47.

The square root of 7720433939 is about 87865.9999032618. Note that the first 4 decimals coincide. The cubic root of 7720433939 is about 1976.4260545283.

The spelling of 7720433939 in words is "seven billion, seven hundred twenty million, four hundred thirty-three thousand, nine hundred thirty-nine".