8992815989 has 2 divisors, whose sum is σ = 8992815990. Its totient is φ = 8992815988.

The previous prime is 8992815959. The next prime is 8992816003. The reversal of 8992815989 is 9895182998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7654500100 + 1338315889 = 87490^2 + 36583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8992815989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8992815959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4496407994 + 4496407995.

It is an arithmetic number, because the mean of its divisors is an integer number (4496407995).

Almost surely, 2^8992815989 is an apocalyptic number.

It is an amenable number.

8992815989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8992815989 is an equidigital number, since it uses as much as digits as its factorization.

8992815989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33592320, while the sum is 68.

The square root of 8992815989 is about 94830.4591837454. The cubic root of 8992815989 is about 2079.5302185011.

The spelling of 8992815989 in words is "eight billion, nine hundred ninety-two million, eight hundred fifteen thousand, nine hundred eighty-nine".