8990770961 has 2 divisors, whose sum is σ = 8990770962. Its totient is φ = 8990770960.

The previous prime is 8990770951. The next prime is 8990770963. The reversal of 8990770961 is 1690770998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7557694225 + 1433076736 = 86935^2 + 37856^2 .

It is a cyclic number.

It is not a de Polignac number, because 8990770961 - 2²² = 8986576657 is a prime.

Together with 8990770963, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8990770897 and 8990770906.

It is not a weakly prime, because it can be changed into another prime (8990770963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4495385480 + 4495385481.

It is an arithmetic number, because the mean of its divisors is an integer number (4495385481).

Almost surely, 2^8990770961 is an apocalyptic number.

It is an amenable number.

8990770961 is a deficient number, since it is larger than the sum of its proper divisors (1).

8990770961 is an equidigital number, since it uses as much as digits as its factorization.

8990770961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1714608, while the sum is 56.

The square root of 8990770961 is about 94819.6760224375. The cubic root of 8990770961 is about 2079.3725734084.

The spelling of 8990770961 in words is "eight billion, nine hundred ninety million, seven hundred seventy thousand, nine hundred sixty-one".