8489663993 has 2 divisors, whose sum is σ = 8489663994. Its totient is φ = 8489663992.

The previous prime is 8489663953. The next prime is 8489664013. The reversal of 8489663993 is 3993669848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8123056384 + 366607609 = 90128^2 + 19147^2 .

It is a cyclic number.

It is not a de Polignac number, because 8489663993 - 2²⁶ = 8422555129 is a prime.

It is not a weakly prime, because it can be changed into another prime (8489663953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4244831996 + 4244831997.

It is an arithmetic number, because the mean of its divisors is an integer number (4244831997).

Almost surely, 2^8489663993 is an apocalyptic number.

It is an amenable number.

8489663993 is a deficient number, since it is larger than the sum of its proper divisors (1).

8489663993 is an equidigital number, since it uses as much as digits as its factorization.

8489663993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60466176, while the sum is 65.

The square root of 8489663993 is about 92139.3726536056. The cubic root of 8489663993 is about 2039.9999994393. Note that the first 6 decimals are identical.

The spelling of 8489663993 in words is "eight billion, four hundred eighty-nine million, six hundred sixty-three thousand, nine hundred ninety-three".