4006109 has 2 divisors, whose sum is σ = 4006110. Its totient is φ = 4006108.

The previous prime is 4006103. The next prime is 4006129. The reversal of 4006109 is 9016004.

It is an a-pointer prime, because the next prime (4006129) can be obtained adding 4006109 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2393209 + 1612900 = 1547^2 + 1270^2 .

It is a cyclic number.

It is not a de Polignac number, because 4006109 - 2¹² = 4002013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4006103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2003054 + 2003055.

It is an arithmetic number, because the mean of its divisors is an integer number (2003055).

Almost surely, 2^4006109 is an apocalyptic number.

It is an amenable number.

4006109 is a deficient number, since it is larger than the sum of its proper divisors (1).

4006109 is an equidigital number, since it uses as much as digits as its factorization.

4006109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 4006109 is about 2001.5266673217. The cubic root of 4006109 is about 158.8208760336.

The spelling of 4006109 in words is "four million, six thousand, one hundred nine".