8646489497 has 2 divisors, whose sum is σ = 8646489498. Its totient is φ = 8646489496.

The previous prime is 8646489443. The next prime is 8646489517. The reversal of 8646489497 is 7949846468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8190069001 + 456420496 = 90499^2 + 21364^2 .

It is a cyclic number.

It is not a de Polignac number, because 8646489497 - 2⁶ = 8646489433 is a prime.

It is not a weakly prime, because it can be changed into another prime (8646489437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4323244748 + 4323244749.

It is an arithmetic number, because the mean of its divisors is an integer number (4323244749).

Almost surely, 2^8646489497 is an apocalyptic number.

It is an amenable number.

8646489497 is a deficient number, since it is larger than the sum of its proper divisors (1).

8646489497 is an equidigital number, since it uses as much as digits as its factorization.

8646489497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83607552, while the sum is 65.

The square root of 8646489497 is about 92986.5016924500. The cubic root of 8646489497 is about 2052.4847520606.

The spelling of 8646489497 in words is "eight billion, six hundred forty-six million, four hundred eighty-nine thousand, four hundred ninety-seven".