716621 has 2 divisors, whose sum is σ = 716622. Its totient is φ = 716620.

The previous prime is 716591. The next prime is 716629. The reversal of 716621 is 126617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504100 + 212521 = 710^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 716621 - 2¹⁴ = 700237 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 716621.

It is not a weakly prime, because it can be changed into another prime (716629) 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, 358310 + 358311.

It is an arithmetic number, because the mean of its divisors is an integer number (358311).

2⁷¹⁶⁶²¹ is an apocalyptic number.

It is an amenable number.

716621 is a deficient number, since it is larger than the sum of its proper divisors (1).

716621 is an equidigital number, since it uses as much as digits as its factorization.

716621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 23.

The square root of 716621 is about 846.5347010017. The cubic root of 716621 is about 89.4876651436.

The spelling of 716621 in words is "seven hundred sixteen thousand, six hundred twenty-one".