8997768973 has 2 divisors, whose sum is σ = 8997768974. Its totient is φ = 8997768972.

The previous prime is 8997768961. The next prime is 8997769009. The reversal of 8997768973 is 3798677998.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7835436324 + 1162332649 = 88518^2 + 34093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8997768973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8997768896 and 8997768905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8997768943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4498884486 + 4498884487.

It is an arithmetic number, because the mean of its divisors is an integer number (4498884487).

Almost surely, 2^8997768973 is an apocalyptic number.

It is an amenable number.

8997768973 is a deficient number, since it is larger than the sum of its proper divisors (1).

8997768973 is an equidigital number, since it uses as much as digits as its factorization.

8997768973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288054144, while the sum is 73.

The square root of 8997768973 is about 94856.5705315135. The cubic root of 8997768973 is about 2079.9119302115.

The spelling of 8997768973 in words is "eight billion, nine hundred ninety-seven million, seven hundred sixty-eight thousand, nine hundred seventy-three".