9928913 has 8 divisors (see below), whose sum is σ = 10271400. Its totient is φ = 9590400.

The previous prime is 9928907. The next prime is 9928927. The reversal of 9928913 is 3198299.

It can be written as a sum of positive squares in 4 ways, for example, as 368449 + 9560464 = 607^2 + 3092^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9928913 - 2²⁰ = 8880337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9928903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4613 + ... + 6413.

It is an arithmetic number, because the mean of its divisors is an integer number (1283925).

Almost surely, 2^9928913 is an apocalyptic number.

It is an amenable number.

9928913 is a deficient number, since it is larger than the sum of its proper divisors (342487).

9928913 is a wasteful number, since it uses less digits than its factorization.

9928913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987.

The product of its digits is 34992, while the sum is 41.

The square root of 9928913 is about 3151.0177720857. The cubic root of 9928913 is about 214.9317468584.

The spelling of 9928913 in words is "nine million, nine hundred twenty-eight thousand, nine hundred thirteen".