4007009 has 4 divisors (see below), whose sum is σ = 4046016. Its totient is φ = 3968004.

The previous prime is 4006993. The next prime is 4007021. The reversal of 4007009 is 9007004.

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 4007009 - 2⁴ = 4006993 is a prime.

It is a super-2 number, since 2×4007009² = 32112242252162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4007039) 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, 19349 + ... + 19554.

It is an arithmetic number, because the mean of its divisors is an integer number (1011504).

Almost surely, 2^4007009 is an apocalyptic number.

It is an amenable number.

4007009 is a deficient number, since it is larger than the sum of its proper divisors (39007).

4007009 is a wasteful number, since it uses less digits than its factorization.

4007009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39006.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 4007009 is about 2001.7514830768. The cubic root of 4007009 is about 158.8327685445.

The spelling of 4007009 in words is "four million, seven thousand, nine".