9894774289 has 2 divisors, whose sum is σ = 9894774290. Its totient is φ = 9894774288.

The previous prime is 9894774259. The next prime is 9894774313. The reversal of 9894774289 is 9824774989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6437334289 + 3457440000 = 80233^2 + 58800^2 .

It is a cyclic number.

It is not a de Polignac number, because 9894774289 - 2⁵ = 9894774257 is a prime.

It is not a weakly prime, because it can be changed into another prime (9894774259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4947387144 + 4947387145.

It is an arithmetic number, because the mean of its divisors is an integer number (4947387145).

Almost surely, 2^9894774289 is an apocalyptic number.

It is an amenable number.

9894774289 is a deficient number, since it is larger than the sum of its proper divisors (1).

9894774289 is an equidigital number, since it uses as much as digits as its factorization.

9894774289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73156608, while the sum is 67.

The square root of 9894774289 is about 99472.4800585569. The cubic root of 9894774289 is about 2146.8512978417.

The spelling of 9894774289 in words is "nine billion, eight hundred ninety-four million, seven hundred seventy-four thousand, two hundred eighty-nine".