100108809 has 6 divisors (see below), whose sum is σ = 144601626. Its totient is φ = 66739200.

The previous prime is 100108807. The next prime is 100108817. The reversal of 100108809 is 908801001.

It can be written as a sum of positive squares in only one way, i.e., 73359225 + 26749584 = 8565^2 + 5172^2 .

It is not a de Polignac number, because 100108809 - 2¹ = 100108807 is a prime.

It is a super-3 number, since 3×100108809³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (100108807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5561592 + ... + 5561609.

It is an arithmetic number, because the mean of its divisors is an integer number (24100271).

Almost surely, 2^100108809 is an apocalyptic number.

It is an amenable number.

100108809 is a deficient number, since it is larger than the sum of its proper divisors (44492817).

100108809 is a wasteful number, since it uses less digits than its factorization.

100108809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11123207 (or 11123204 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 100108809 is about 10005.4389708798. The cubic root of 100108809 is about 464.3271712184.

The spelling of 100108809 in words is "one hundred million, one hundred eight thousand, eight hundred nine".