8990770997 has 4 divisors (see below), whose sum is σ = 9682368780. Its totient is φ = 8299173216.

The previous prime is 8990770963. The next prime is 8990771021. The reversal of 8990770997 is 7990770998.

8990770997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 689010001 + 8301760996 = 26249^2 + 91114^2 .

It is a cyclic number.

It is not a de Polignac number, because 8990770997 - 2⁸ = 8990770741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8990770927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345798872 + ... + 345798897.

It is an arithmetic number, because the mean of its divisors is an integer number (2420592195).

Almost surely, 2^8990770997 is an apocalyptic number.

It is an amenable number.

8990770997 is a deficient number, since it is larger than the sum of its proper divisors (691597783).

8990770997 is a wasteful number, since it uses less digits than its factorization.

8990770997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691597782.

The product of its (nonzero) digits is 18003384, while the sum is 65.

The square root of 8990770997 is about 94819.6762122715. The cubic root of 8990770997 is about 2079.3725761838.

Subtracting from 8990770997 its reverse (7990770998), we obtain a palindrome (999999999).

The spelling of 8990770997 in words is "eight billion, nine hundred ninety million, seven hundred seventy thousand, nine hundred ninety-seven".