4139009 has 4 divisors (see below), whose sum is σ = 4730304. Its totient is φ = 3547716.

The previous prime is 4138999. The next prime is 4139029. The reversal of 4139009 is 9009314.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4139009 - 2⁴ = 4138993 is a prime.

It is a super-3 number, since 3×4139009³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4139029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295637 + ... + 295650.

It is an arithmetic number, because the mean of its divisors is an integer number (1182576).

It is a Proth number, since it is equal to 2021 ⋅ 2¹¹ + 1 and 2021 < 2¹¹.

Almost surely, 2^4139009 is an apocalyptic number.

It is an amenable number.

4139009 is a deficient number, since it is larger than the sum of its proper divisors (591295).

4139009 is an equidigital number, since it uses as much as digits as its factorization.

4139009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591294.

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

The square root of 4139009 is about 2034.4554553983. The cubic root of 4139009 is about 160.5580642844.

The spelling of 4139009 in words is "four million, one hundred thirty-nine thousand, nine".