9999902 has 8 divisors (see below), whose sum is σ = 16363512. Its totient is φ = 4545400.

The previous prime is 9999901. The next prime is 9999907. The reversal of 9999902 is 2099999.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999901) 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 3 ways as a sum of consecutive naturals, for example, 227249 + ... + 227292.

It is an arithmetic number, because the mean of its divisors is an integer number (2045439).

Almost surely, 2^9999902 is an apocalyptic number.

9999902 is a deficient number, since it is larger than the sum of its proper divisors (6363610).

9999902 is a wasteful number, since it uses less digits than its factorization.

9999902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454554.

The product of its (nonzero) digits is 118098, while the sum is 47.

The square root of 9999902 is about 3162.2621649699. The cubic root of 9999902 is about 215.4427652189.

It can be divided in two parts, 9999 and 902, that added together give a palindrome (10901).

The spelling of 9999902 in words is "nine million, nine hundred ninety-nine thousand, nine hundred two".