3997009 has 4 divisors (see below), whose sum is σ = 4170816. Its totient is φ = 3823204.

The previous prime is 3997003. The next prime is 3997039. The reversal of 3997009 is 9007993.

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 3997009 - 2³ = 3997001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3997001) 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, 86869 + ... + 86914.

It is an arithmetic number, because the mean of its divisors is an integer number (1042704).

Almost surely, 2^3997009 is an apocalyptic number.

It is an amenable number.

3997009 is a deficient number, since it is larger than the sum of its proper divisors (173807).

3997009 is a wasteful number, since it uses less digits than its factorization.

3997009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173806.

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 3997009 is about 1999.2521101652. The cubic root of 3997009 is about 158.7005293597.

The spelling of 3997009 in words is "three million, nine hundred ninety-seven thousand, nine".