9977997853 has 2 divisors, whose sum is σ = 9977997854. Its totient is φ = 9977997852.

The previous prime is 9977997791. The next prime is 9977997857. The reversal of 9977997853 is 3587997799.

9977997853 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5086114489 + 4891883364 = 71317^2 + 69942^2 .

It is a cyclic number.

It is not a de Polignac number, because 9977997853 - 2¹⁷ = 9977866781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9977997857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4988998926 + 4988998927.

It is an arithmetic number, because the mean of its divisors is an integer number (4988998927).

Almost surely, 2^9977997853 is an apocalyptic number.

It is an amenable number.

9977997853 is a deficient number, since it is larger than the sum of its proper divisors (1).

9977997853 is an equidigital number, since it uses as much as digits as its factorization.

9977997853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270050760, while the sum is 73.

The square root of 9977997853 is about 99889.9286865298. The cubic root of 9977997853 is about 2152.8534568217.

The spelling of 9977997853 in words is "nine billion, nine hundred seventy-seven million, nine hundred ninety-seven thousand, eight hundred fifty-three".