9969525 has 36 divisors (see below), whose sum is σ = 18183360. Its totient is φ = 5220000.

The previous prime is 9969523. The next prime is 9969527. The reversal of 9969525 is 5259699.

9969525 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9969523) and next prime (9969527).

It is not a de Polignac number, because 9969525 - 2¹ = 9969523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9969523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12900 + ... + 13650.

Almost surely, 2^9969525 is an apocalyptic number.

It is an amenable number.

9969525 is a deficient number, since it is larger than the sum of its proper divisors (8213835).

9969525 is a wasteful number, since it uses less digits than its factorization.

9969525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 818 counting only the distinct ones).

The product of its digits is 218700, while the sum is 45.

The square root of 9969525 is about 3157.4554628688. The cubic root of 9969525 is about 215.2243916489.

The spelling of 9969525 in words is "nine million, nine hundred sixty-nine thousand, five hundred twenty-five".