100550009 has 6 divisors (see below), whose sum is σ = 116966394. Its totient is φ = 86185680.

The previous prime is 100550003. The next prime is 100550011. The reversal of 100550009 is 900055001.

It can be written as a sum of positive squares in only one way, i.e., 100060009 + 490000 = 10003^2 + 700^2 .

It is not a de Polignac number, because 100550009 - 2¹⁶ = 100484473 is a prime.

It is a super-2 number, since 2×100550009² = 20220608619800162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100550003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1025972 + ... + 1026069.

It is an arithmetic number, because the mean of its divisors is an integer number (19494399).

Almost surely, 2^100550009 is an apocalyptic number.

It is an amenable number.

100550009 is a deficient number, since it is larger than the sum of its proper divisors (16416385).

100550009 is an equidigital number, since it uses as much as digits as its factorization.

100550009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052055 (or 2052048 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 100550009 is about 10027.4627398959. The cubic root of 100550009 is about 465.0082998480.

The spelling of 100550009 in words is "one hundred million, five hundred fifty thousand, nine".