7720319 has 2 divisors, whose sum is σ = 7720320. Its totient is φ = 7720318.

The previous prime is 7720313. The next prime is 7720331. The reversal of 7720319 is 9130277.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7720319 is a prime.

It is a super-2 number, since 2×7720319² = 119206650923522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7720291 and 7720300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7720313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860159 + 3860160.

It is an arithmetic number, because the mean of its divisors is an integer number (3860160).

Almost surely, 2^7720319 is an apocalyptic number.

7720319 is a deficient number, since it is larger than the sum of its proper divisors (1).

7720319 is an equidigital number, since it uses as much as digits as its factorization.

7720319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 7720319 is about 2778.5462026031. The cubic root of 7720319 is about 197.6416246377.

The spelling of 7720319 in words is "seven million, seven hundred twenty thousand, three hundred nineteen".