8649534989 has 2 divisors, whose sum is σ = 8649534990. Its totient is φ = 8649534988.

The previous prime is 8649534937. The next prime is 8649535001. The reversal of 8649534989 is 9894359468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8633197225 + 16337764 = 92915^2 + 4042^2 .

It is a cyclic number.

It is not a de Polignac number, because 8649534989 - 2¹² = 8649530893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8649534919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4324767494 + 4324767495.

It is an arithmetic number, because the mean of its divisors is an integer number (4324767495).

Almost surely, 2^8649534989 is an apocalyptic number.

It is an amenable number.

8649534989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8649534989 is an equidigital number, since it uses as much as digits as its factorization.

8649534989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67184640, while the sum is 65.

The square root of 8649534989 is about 93002.8762404690. The cubic root of 8649534989 is about 2052.7257011819.

The spelling of 8649534989 in words is "eight billion, six hundred forty-nine million, five hundred thirty-four thousand, nine hundred eighty-nine".