9778997297 has 4 divisors (see below), whose sum is σ = 9779260020. Its totient is φ = 9778734576.

The previous prime is 9778997233. The next prime is 9778997321. The reversal of 9778997297 is 7927998779.

9778997297 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 4016517376 + 5762479921 = 63376^2 + 75911^2 .

It is a cyclic number.

It is not a de Polignac number, because 9778997297 - 2⁶ = 9778997233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9778997497) 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, 64022 + ... + 153807.

It is an arithmetic number, because the mean of its divisors is an integer number (2444815005).

Almost surely, 2^9778997297 is an apocalyptic number.

It is an amenable number.

9778997297 is a deficient number, since it is larger than the sum of its proper divisors (262723).

9778997297 is a wasteful number, since it uses less digits than its factorization.

9778997297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262722.

The product of its digits is 252047376, while the sum is 74.

The square root of 9778997297 is about 98888.8128000331. The cubic root of 9778997297 is about 2138.4451174326.

The spelling of 9778997297 in words is "nine billion, seven hundred seventy-eight million, nine hundred ninety-seven thousand, two hundred ninety-seven".