718910081 has 2 divisors, whose sum is σ = 718910082. Its totient is φ = 718910080.

The previous prime is 718910051. The next prime is 718910131. The reversal of 718910081 is 180019817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382554481 + 336355600 = 19559^2 + 18340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-718910081 is a prime.

It is a super-2 number, since 2×718910081² = 1033663409126853122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (718910051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359455040 + 359455041.

It is an arithmetic number, because the mean of its divisors is an integer number (359455041).

Almost surely, 2^718910081 is an apocalyptic number.

It is an amenable number.

718910081 is a deficient number, since it is larger than the sum of its proper divisors (1).

718910081 is an equidigital number, since it uses as much as digits as its factorization.

718910081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 718910081 is about 26812.4985967366. The cubic root of 718910081 is about 895.8284646014.

Adding to 718910081 its reverse (180019817), we get a palindrome (898929898).

The spelling of 718910081 in words is "seven hundred eighteen million, nine hundred ten thousand, eighty-one".