9898523 has 4 divisors (see below), whose sum is σ = 9918480. Its totient is φ = 9878568.

The previous prime is 9898519. The next prime is 9898543. The reversal of 9898523 is 3258989.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9898523 - 2² = 9898519 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9898543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9215 + ... + 10232.

It is an arithmetic number, because the mean of its divisors is an integer number (2479620).

Almost surely, 2^9898523 is an apocalyptic number.

9898523 is a deficient number, since it is larger than the sum of its proper divisors (19957).

9898523 is a wasteful number, since it uses less digits than its factorization.

9898523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19956.

The product of its digits is 155520, while the sum is 44.

The square root of 9898523 is about 3146.1918250482. The cubic root of 9898523 is about 214.7122380628.

The spelling of 9898523 in words is "nine million, eight hundred ninety-eight thousand, five hundred twenty-three".