9927813 has 16 divisors (see below), whose sum is σ = 16018560. Its totient is φ = 5339136.

The previous prime is 9927809. The next prime is 9927833. The reversal of 9927813 is 3187299.

It is not a de Polignac number, because 9927813 - 2² = 9927809 is a prime.

It is a super-2 number, since 2×9927813² = 197122941925938, which contains 22 as substring.

It is a d-powerful number, because it can be written as 9⁴ + 9⁶ + 2²³ + 7⁷ + 8³ + 1 + 3¹¹ .

9927813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9927833) 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 15 ways as a sum of consecutive naturals, for example, 13548 + ... + 14261.

It is an arithmetic number, because the mean of its divisors is an integer number (1001160).

Almost surely, 2^9927813 is an apocalyptic number.

It is an amenable number.

9927813 is a deficient number, since it is larger than the sum of its proper divisors (6090747).

9927813 is a wasteful number, since it uses less digits than its factorization.

9927813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27836.

The product of its digits is 27216, while the sum is 39.

The square root of 9927813 is about 3150.8432204729. The cubic root of 9927813 is about 214.9238093110.

The spelling of 9927813 in words is "nine million, nine hundred twenty-seven thousand, eight hundred thirteen".