7720049 has 2 divisors, whose sum is σ = 7720050. Its totient is φ = 7720048.

The previous prime is 7720039. The next prime is 7720051. The reversal of 7720049 is 9400277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4129024 + 3591025 = 2032^2 + 1895^2 .

It is an emirp because it is prime and its reverse (9400277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7720049 - 2⁸ = 7719793 is a prime.

It is a Sophie Germain prime.

Together with 7720051, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7720039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860024 + 3860025.

It is an arithmetic number, because the mean of its divisors is an integer number (3860025).

Almost surely, 2^7720049 is an apocalyptic number.

It is an amenable number.

7720049 is a deficient number, since it is larger than the sum of its proper divisors (1).

7720049 is an equidigital number, since it uses as much as digits as its factorization.

7720049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 7720049 is about 2778.4976156189. The cubic root of 7720049 is about 197.6393205938.

The spelling of 7720049 in words is "seven million, seven hundred twenty thousand, forty-nine".