8990770999 has 4 divisors (see below), whose sum is σ = 10275166864. Its totient is φ = 7706375136.

The previous prime is 8990770963. The next prime is 8990771021. The reversal of 8990770999 is 9990770998.

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

It is a cyclic number.

It is not a de Polignac number, because 8990770999 - 2²³ = 8982382391 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 (8990770099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642197922 + ... + 642197935.

It is an arithmetic number, because the mean of its divisors is an integer number (2568791716).

Almost surely, 2^8990770999 is an apocalyptic number.

8990770999 is a deficient number, since it is larger than the sum of its proper divisors (1284395865).

8990770999 is a wasteful number, since it uses less digits than its factorization.

8990770999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284395864.

The product of its (nonzero) digits is 23147208, while the sum is 67.

The square root of 8990770999 is about 94819.6762228178. The cubic root of 8990770999 is about 2079.3725763380.

Subtracting 8990770999 from its reverse (9990770998), we obtain a palindrome (999999999).

The spelling of 8990770999 in words is "eight billion, nine hundred ninety million, seven hundred seventy thousand, nine hundred ninety-nine".