718281457 has 2 divisors, whose sum is σ = 718281458. Its totient is φ = 718281456.

The previous prime is 718281427. The next prime is 718281479. The reversal of 718281457 is 754182817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 560552976 + 157728481 = 23676^2 + 12559^2 .

It is an emirp because it is prime and its reverse (754182817) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-718281457 is a prime.

It is not a weakly prime, because it can be changed into another prime (718281427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359140728 + 359140729.

It is an arithmetic number, because the mean of its divisors is an integer number (359140729).

Almost surely, 2^718281457 is an apocalyptic number.

It is an amenable number.

718281457 is a deficient number, since it is larger than the sum of its proper divisors (1).

718281457 is an equidigital number, since it uses as much as digits as its factorization.

718281457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125440, while the sum is 43.

The square root of 718281457 is about 26800.7734403319. The cubic root of 718281457 is about 895.5672805738.

The spelling of 718281457 in words is "seven hundred eighteen million, two hundred eighty-one thousand, four hundred fifty-seven".