100100005 has 4 divisors (see below), whose sum is σ = 120120012. Its totient is φ = 80080000.

The previous prime is 100099981. The next prime is 100100051. The reversal of 100100005 is 500001001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47087044 + 53012961 = 6862^2 + 7281^2 .

It is not a de Polignac number, because 100100005 - 2⁵ = 100099973 is a prime.

It is a super-2 number, since 2×100100005² = 20040022002000050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10009996 + ... + 10010005.

It is an arithmetic number, because the mean of its divisors is an integer number (30030003).

Almost surely, 2^100100005 is an apocalyptic number.

It is an amenable number.

100100005 is a deficient number, since it is larger than the sum of its proper divisors (20020007).

100100005 is an equidigital number, since it uses as much as digits as its factorization.

100100005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20020006.

The product of its (nonzero) digits is 5, while the sum is 7.

The square root of 100100005 is about 10004.9990004997. Note that the first 3 decimals coincide. The cubic root of 100100005 is about 464.3135591753.

Adding to 100100005 its reverse (500001001), we get a palindrome (600101006).

The spelling of 100100005 in words is "one hundred million, one hundred thousand, five".