4009139 has 2 divisors, whose sum is σ = 4009140. Its totient is φ = 4009138.

The previous prime is 4009097. The next prime is 4009141. The reversal of 4009139 is 9319004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4009139 - 2⁸ = 4008883 is a prime.

It is a Sophie Germain prime.

Together with 4009141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4009039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2004569 + 2004570.

It is an arithmetic number, because the mean of its divisors is an integer number (2004570).

Almost surely, 2^4009139 is an apocalyptic number.

4009139 is a deficient number, since it is larger than the sum of its proper divisors (1).

4009139 is an equidigital number, since it uses as much as digits as its factorization.

4009139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 4009139 is about 2002.2834464681. The cubic root of 4009139 is about 158.8609070612.

The spelling of 4009139 in words is "four million, nine thousand, one hundred thirty-nine".