8719473661 has 2 divisors, whose sum is σ = 8719473662. Its totient is φ = 8719473660.

The previous prime is 8719473551. The next prime is 8719473667. The reversal of 8719473661 is 1663749178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8155173636 + 564300025 = 90306^2 + 23755^2 .

It is a cyclic number.

It is not a de Polignac number, because 8719473661 - 2¹¹ = 8719471613 is a prime.

It is a super-3 number, since 3×8719473661³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8719473599 and 8719473608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8719473667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4359736830 + 4359736831.

It is an arithmetic number, because the mean of its divisors is an integer number (4359736831).

Almost surely, 2^8719473661 is an apocalyptic number.

It is an amenable number.

8719473661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8719473661 is an equidigital number, since it uses as much as digits as its factorization.

8719473661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The square root of 8719473661 is about 93378.1219611960. The cubic root of 8719473661 is about 2058.2435196326.

The spelling of 8719473661 in words is "eight billion, seven hundred nineteen million, four hundred seventy-three thousand, six hundred sixty-one".