9999922 has 4 divisors (see below), whose sum is σ = 14999886. Its totient is φ = 4999960.

The previous prime is 9999907. The next prime is 9999929. The reversal of 9999922 is 2299999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2299999 = 13 ⋅176923.

It can be written as a sum of positive squares in only one way, i.e., 7722841 + 2277081 = 2779^2 + 1509^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9999929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499979 + ... + 2499982.

Almost surely, 2^9999922 is an apocalyptic number.

9999922 is a deficient number, since it is larger than the sum of its proper divisors (4999964).

9999922 is a wasteful number, since it uses less digits than its factorization.

9999922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999963.

The product of its digits is 236196, while the sum is 49.

The square root of 9999922 is about 3162.2653272615. The cubic root of 9999922 is about 215.4429088487.

The spelling of 9999922 in words is "nine million, nine hundred ninety-nine thousand, nine hundred twenty-two".