721080589 has 2 divisors, whose sum is σ = 721080590. Its totient is φ = 721080588.

The previous prime is 721080539. The next prime is 721080601. The reversal of 721080589 is 985080127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 517790025 + 203290564 = 22755^2 + 14258^2 .

It is an emirp because it is prime and its reverse (985080127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 721080589 - 2¹¹ = 721078541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721080509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360540294 + 360540295.

It is an arithmetic number, because the mean of its divisors is an integer number (360540295).

Almost surely, 2^721080589 is an apocalyptic number.

It is an amenable number.

721080589 is a deficient number, since it is larger than the sum of its proper divisors (1).

721080589 is an equidigital number, since it uses as much as digits as its factorization.

721080589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 721080589 is about 26852.9437678628. The cubic root of 721080589 is about 896.7291100608.

The spelling of 721080589 in words is "seven hundred twenty-one million, eighty thousand, five hundred eighty-nine".