40108109 has 2 divisors, whose sum is σ = 40108110. Its totient is φ = 40108108.

The previous prime is 40108093. The next prime is 40108129. The reversal of 40108109 is 90180104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36120100 + 3988009 = 6010^2 + 1997^2 .

It is a cyclic number.

It is not a de Polignac number, because 40108109 - 2⁴ = 40108093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40108129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20054054 + 20054055.

It is an arithmetic number, because the mean of its divisors is an integer number (20054055).

Almost surely, 2^40108109 is an apocalyptic number.

It is an amenable number.

40108109 is a deficient number, since it is larger than the sum of its proper divisors (1).

40108109 is an equidigital number, since it uses as much as digits as its factorization.

40108109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 40108109 is about 6333.0963201265. The cubic root of 40108109 is about 342.3030184919.

The spelling of 40108109 in words is "forty million, one hundred eight thousand, one hundred nine".