7319711681 has 2 divisors, whose sum is σ = 7319711682. Its totient is φ = 7319711680.

The previous prime is 7319711647. The next prime is 7319711689. The reversal of 7319711681 is 1861179137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6607088656 + 712623025 = 81284^2 + 26695^2 .

It is a cyclic number.

It is not a de Polignac number, because 7319711681 - 2¹⁴ = 7319695297 is a prime.

It is a super-2 number, since 2×7319711681² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7319711689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3659855840 + 3659855841.

It is an arithmetic number, because the mean of its divisors is an integer number (3659855841).

Almost surely, 2^7319711681 is an apocalyptic number.

It is an amenable number.

7319711681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7319711681 is an equidigital number, since it uses as much as digits as its factorization.

7319711681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 44.

The square root of 7319711681 is about 85555.3135754875. The cubic root of 7319711681 is about 1941.6218839391.

The spelling of 7319711681 in words is "seven billion, three hundred nineteen million, seven hundred eleven thousand, six hundred eighty-one".