718523161 has 2 divisors, whose sum is σ = 718523162. Its totient is φ = 718523160.

The previous prime is 718523129. The next prime is 718523203. The reversal of 718523161 is 161325817.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 681993225 + 36529936 = 26115^2 + 6044^2 .

It is an emirp because it is prime and its reverse (161325817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 718523161 - 2⁵ = 718523129 is a prime.

It is not a weakly prime, because it can be changed into another prime (718523261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359261580 + 359261581.

It is an arithmetic number, because the mean of its divisors is an integer number (359261581).

Almost surely, 2^718523161 is an apocalyptic number.

It is an amenable number.

718523161 is a deficient number, since it is larger than the sum of its proper divisors (1).

718523161 is an equidigital number, since it uses as much as digits as its factorization.

718523161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 718523161 is about 26805.2823338983. The cubic root of 718523161 is about 895.6677230565.

Adding to 718523161 its reverse (161325817), we get a palindrome (879848978).

The spelling of 718523161 in words is "seven hundred eighteen million, five hundred twenty-three thousand, one hundred sixty-one".