100009556 has 6 divisors (see below), whose sum is σ = 175016730. Its totient is φ = 50004776.

The previous prime is 100009549. The next prime is 100009573. The reversal of 100009556 is 655900001.

It can be written as a sum of positive squares in only one way, i.e., 58277956 + 41731600 = 7634^2 + 6460^2 .

It is a super-2 number, since 2×100009556² = 20003822582634272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12501191 + ... + 12501198.

It is an arithmetic number, because the mean of its divisors is an integer number (29169455).

Almost surely, 2^100009556 is an apocalyptic number.

It is an amenable number.

100009556 is a deficient number, since it is larger than the sum of its proper divisors (75007174).

100009556 is a wasteful number, since it uses less digits than its factorization.

100009556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25002393 (or 25002391 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 100009556 is about 10000.4777885859. The cubic root of 100009556 is about 464.1736678980.

Adding to 100009556 its reverse (655900001), we get a palindrome (755909557).

The spelling of 100009556 in words is "one hundred million, nine thousand, five hundred fifty-six".