100282009 has 4 divisors (see below), whose sum is σ = 100569700. Its totient is φ = 99994320.

The previous prime is 100281953. The next prime is 100282027. The reversal of 100282009 is 900282001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900282001 = 1153 ⋅780817.

It can be written as a sum of positive squares in 2 ways, for example, as 45522009 + 54760000 = 6747^2 + 7400^2 .

It is a cyclic number.

It is not a de Polignac number, because 100282009 - 2¹¹ = 100279961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100282079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143322 + ... + 144019.

It is an arithmetic number, because the mean of its divisors is an integer number (25142425).

Almost surely, 2^100282009 is an apocalyptic number.

It is an amenable number.

100282009 is a deficient number, since it is larger than the sum of its proper divisors (287691).

100282009 is an equidigital number, since it uses as much as digits as its factorization.

100282009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287690.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 100282009 is about 10014.0905228583. The cubic root of 100282009 is about 464.5947971208.

The spelling of 100282009 in words is "one hundred million, two hundred eighty-two thousand, nine".