4012109 has 2 divisors, whose sum is σ = 4012110. Its totient is φ = 4012108.

The previous prime is 4012103. The next prime is 4012111. The reversal of 4012109 is 9012104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4012009 + 100 = 2003^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012109 - 2¹² = 4008013 is a prime.

Together with 4012111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4012103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006054 + 2006055.

It is an arithmetic number, because the mean of its divisors is an integer number (2006055).

Almost surely, 2^4012109 is an apocalyptic number.

It is an amenable number.

4012109 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012109 is an equidigital number, since it uses as much as digits as its factorization.

4012109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 4012109 is about 2003.0249624006. The cubic root of 4012109 is about 158.9001258256.

The spelling of 4012109 in words is "four million, twelve thousand, one hundred nine".