7720123 has 2 divisors, whose sum is σ = 7720124. Its totient is φ = 7720122.

The previous prime is 7720121. The next prime is 7720151. The reversal of 7720123 is 3210277.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7720123 - 2¹ = 7720121 is a prime.

Together with 7720121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 7720094 and 7720103.

It is not a weakly prime, because it can be changed into another prime (7720121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860061 + 3860062.

It is an arithmetic number, because the mean of its divisors is an integer number (3860062).

Almost surely, 2^7720123 is an apocalyptic number.

7720123 is a deficient number, since it is larger than the sum of its proper divisors (1).

7720123 is an equidigital number, since it uses as much as digits as its factorization.

7720123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 7720123 is about 2778.5109321361. The cubic root of 7720123 is about 197.6399520778.

The spelling of 7720123 in words is "seven million, seven hundred twenty thousand, one hundred twenty-three".