9897814529 has 4 divisors (see below), whose sum is σ = 9936327684. Its totient is φ = 9859301376.

The previous prime is 9897814499. The next prime is 9897814547. The reversal of 9897814529 is 9254187989.

9897814529 is digitally balanced in base 3, 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 5022982129 + 4874832400 = 70873^2 + 69820^2 .

It is a cyclic number.

It is not a de Polignac number, because 9897814529 - 2²⁰ = 9896765953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9897811529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19256192 + ... + 19256705.

It is an arithmetic number, because the mean of its divisors is an integer number (2484081921).

Almost surely, 2^9897814529 is an apocalyptic number.

It is an amenable number.

9897814529 is a deficient number, since it is larger than the sum of its proper divisors (38513155).

9897814529 is a wasteful number, since it uses less digits than its factorization.

9897814529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38513154.

The product of its digits is 13063680, while the sum is 62.

The square root of 9897814529 is about 99487.7606994951. The cubic root of 9897814529 is about 2147.0711537855.

The spelling of 9897814529 in words is "nine billion, eight hundred ninety-seven million, eight hundred fourteen thousand, five hundred twenty-nine".