9929925 has 48 divisors (see below), whose sum is σ = 18689280. Its totient is φ = 5166720.

The previous prime is 9929917. The next prime is 9929929. The reversal of 9929925 is 5299299.

It is not a de Polignac number, because 9929925 - 2³ = 9929917 is a prime.

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

9929925 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9929929) 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 47 ways as a sum of consecutive naturals, for example, 31569 + ... + 31881.

It is an arithmetic number, because the mean of its divisors is an integer number (389360).

Almost surely, 2^9929925 is an apocalyptic number.

It is an amenable number.

9929925 is a deficient number, since it is larger than the sum of its proper divisors (8759355).

9929925 is a wasteful number, since it uses less digits than its factorization.

9929925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 368 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 9929925 is about 3151.1783510300. The cubic root of 9929925 is about 214.9390488843.

The spelling of 9929925 in words is "nine million, nine hundred twenty-nine thousand, nine hundred twenty-five".