999099902 has 4 divisors (see below), whose sum is σ = 1498649856. Its totient is φ = 499549950.

The previous prime is 999099901. The next prime is 999099919. The reversal of 999099902 is 209990999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 209990999 = 4079 ⋅51481.

It is a super-2 number, since 2×999099902² = 1996401228352819208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999099901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249774974 + ... + 249774977.

It is an arithmetic number, because the mean of its divisors is an integer number (374662464).

Almost surely, 2^999099902 is an apocalyptic number.

999099902 is a deficient number, since it is larger than the sum of its proper divisors (499549954).

999099902 is a wasteful number, since it uses less digits than its factorization.

999099902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499549953.

The product of its (nonzero) digits is 1062882, while the sum is 56.

The square root of 999099902 is about 31608.5415987514. The cubic root of 999099902 is about 999.6998772687.

It can be divided in two parts, 999099 and 902, that added together give a palindrome (1000001).

The spelling of 999099902 in words is "nine hundred ninety-nine million, ninety-nine thousand, nine hundred two".