9980523 has 16 divisors (see below), whose sum is σ = 16898560. Its totient is φ = 5703048.

The previous prime is 9980519. The next prime is 9980539. The reversal of 9980523 is 3250899.

It is not a de Polignac number, because 9980523 - 2² = 9980519 is a prime.

It is a super-2 number, since 2×9980523² = 199221678707058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9980123) 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 15 ways as a sum of consecutive naturals, for example, 26215 + ... + 26592.

It is an arithmetic number, because the mean of its divisors is an integer number (1056160).

Almost surely, 2^9980523 is an apocalyptic number.

9980523 is a deficient number, since it is larger than the sum of its proper divisors (6918037).

9980523 is a wasteful number, since it uses less digits than its factorization.

9980523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52823 (or 52817 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 9980523 is about 3159.1965750804. The cubic root of 9980523 is about 215.3035050130.

The spelling of 9980523 in words is "nine million, nine hundred eighty thousand, five hundred twenty-three".