7216723 has 2 divisors, whose sum is σ = 7216724. Its totient is φ = 7216722.

The previous prime is 7216717. The next prime is 7216757. The reversal of 7216723 is 3276127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7216723 - 2⁵ = 7216691 is a prime.

It is an alternating number because its digits alternate between odd and even.

7216723 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7216691 and 7216700.

It is not a weakly prime, because it can be changed into another prime (7216763) 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, 3608361 + 3608362.

It is an arithmetic number, because the mean of its divisors is an integer number (3608362).

Almost surely, 2^7216723 is an apocalyptic number.

7216723 is a deficient number, since it is larger than the sum of its proper divisors (1).

7216723 is an equidigital number, since it uses as much as digits as its factorization.

7216723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 28.

The square root of 7216723 is about 2686.3959127426. The cubic root of 7216723 is about 193.2472602057.

The spelling of 7216723 in words is "seven million, two hundred sixteen thousand, seven hundred twenty-three".