9897853 has 6 divisors (see below), whose sum is σ = 11513886. Its totient is φ = 8483832.

The previous prime is 9897847. The next prime is 9897857. The reversal of 9897853 is 3587989.

It can be written as a sum of positive squares in only one way, i.e., 9018009 + 879844 = 3003^2 + 938^2 .

It is not a de Polignac number, because 9897853 - 2¹⁷ = 9766781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 201997 = 9897853 / (9 + 8 + 9 + 7 + 8 + 5 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9897797 and 9897806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9897857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100950 + ... + 101047.

It is an arithmetic number, because the mean of its divisors is an integer number (1918981).

Almost surely, 2^9897853 is an apocalyptic number.

It is an amenable number.

9897853 is a deficient number, since it is larger than the sum of its proper divisors (1616033).

9897853 is a wasteful number, since it uses less digits than its factorization.

9897853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202011 (or 202004 counting only the distinct ones).

The product of its digits is 544320, while the sum is 49.

The square root of 9897853 is about 3146.0853453141. The cubic root of 9897853 is about 214.7073935540.

The spelling of 9897853 in words is "nine million, eight hundred ninety-seven thousand, eight hundred fifty-three".