100518109 has 2 divisors, whose sum is σ = 100518110. Its totient is φ = 100518108.

The previous prime is 100518107. The next prime is 100518163. The reversal of 100518109 is 901815001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95981209 + 4536900 = 9797^2 + 2130^2 .

It is a cyclic number.

It is not a de Polignac number, because 100518109 - 2¹ = 100518107 is a prime.

Together with 100518107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100518107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50259054 + 50259055.

It is an arithmetic number, because the mean of its divisors is an integer number (50259055).

Almost surely, 2^100518109 is an apocalyptic number.

It is an amenable number.

100518109 is a deficient number, since it is larger than the sum of its proper divisors (1).

100518109 is an equidigital number, since it uses as much as digits as its factorization.

100518109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 100518109 is about 10025.8719820273. The cubic root of 100518109 is about 464.9591192333.

The spelling of 100518109 in words is "one hundred million, five hundred eighteen thousand, one hundred nine".