718870081 has 2 divisors, whose sum is σ = 718870082. Its totient is φ = 718870080.

The previous prime is 718870057. The next prime is 718870127. The reversal of 718870081 is 180078817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387302400 + 331567681 = 19680^2 + 18209^2 .

It is an emirp because it is prime and its reverse (180078817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 718870081 - 2⁵ = 718870049 is a prime.

It is a super-2 number, since 2×718870081² = 1033548386713893122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (718870051) 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, 359435040 + 359435041.

It is an arithmetic number, because the mean of its divisors is an integer number (359435041).

Almost surely, 2^718870081 is an apocalyptic number.

It is an amenable number.

718870081 is a deficient number, since it is larger than the sum of its proper divisors (1).

718870081 is an equidigital number, since it uses as much as digits as its factorization.

718870081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 40.

The square root of 718870081 is about 26811.7526655756. The cubic root of 718870081 is about 895.8118497265.

The spelling of 718870081 in words is "seven hundred eighteen million, eight hundred seventy thousand, eighty-one".