100009990 has 16 divisors (see below), whose sum is σ = 180168048. Its totient is φ = 39970656.

The previous prime is 100009979. The next prime is 100010017. The reversal of 100009990 is 99900001.

100009990 is a modest number, since divided by 9990 gives 100 as remainder.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11089 + ... + 17971.

It is an arithmetic number, because the mean of its divisors is an integer number (11260503).

Almost surely, 2^100009990 is an apocalyptic number.

100009990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100009990 is a deficient number, since it is larger than the sum of its proper divisors (80158058).

100009990 is a wasteful number, since it uses less digits than its factorization.

100009990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8343.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 100009990 is about 10000.4994875256. The cubic root of 100009990 is about 464.1743393374.

Adding to 100009990 its reverse (99900001), we get a palindrome (199909991).

The spelling of 100009990 in words is "one hundred million, nine thousand, nine hundred ninety".