9999827 has 4 divisors (see below), whose sum is σ = 10103016. Its totient is φ = 9896640.

The previous prime is 9999823. The next prime is 9999863. The reversal of 9999827 is 7289999.

9999827 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9999827 - 2² = 9999823 is a prime.

It is a d-powerful number, because it can be written as 9² + 9⁶ + 9⁶ + 9⁶ + 8 + 2²³ + 7⁵ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9999823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51449 + ... + 51642.

It is an arithmetic number, because the mean of its divisors is an integer number (2525754).

Almost surely, 2^9999827 is an apocalyptic number.

9999827 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

9999827 is a deficient number, since it is larger than the sum of its proper divisors (103189).

9999827 is a wasteful number, since it uses less digits than its factorization.

9999827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103188.

The product of its digits is 734832, while the sum is 53.

The square root of 9999827 is about 3162.2503063483. The cubic root of 9999827 is about 215.4422266054.

The spelling of 9999827 in words is "nine million, nine hundred ninety-nine thousand, eight hundred twenty-seven".