716389 has 2 divisors, whose sum is σ = 716390. Its totient is φ = 716388.

The previous prime is 716383. The next prime is 716399. The reversal of 716389 is 983617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693889 + 22500 = 833^2 + 150^2 .

It is an emirp because it is prime and its reverse (983617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 716389 - 2⁹ = 715877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (716383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358194 + 358195.

It is an arithmetic number, because the mean of its divisors is an integer number (358195).

2⁷¹⁶³⁸⁹ is an apocalyptic number.

It is an amenable number.

716389 is a deficient number, since it is larger than the sum of its proper divisors (1).

716389 is an equidigital number, since it uses as much as digits as its factorization.

716389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 716389 is about 846.3976606773. The cubic root of 716389 is about 89.4780071426.

The spelling of 716389 in words is "seven hundred sixteen thousand, three hundred eighty-nine".