3890009 has 4 divisors (see below), whose sum is σ = 3904740. Its totient is φ = 3875280.

The previous prime is 3889993. The next prime is 3890011. The reversal of 3890009 is 9000983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 222784 + 3667225 = 472^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 3890009 - 2⁴ = 3889993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3890309) 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, 6962 + ... + 7499.

It is an arithmetic number, because the mean of its divisors is an integer number (976185).

Almost surely, 2^3890009 is an apocalyptic number.

It is an amenable number.

3890009 is a deficient number, since it is larger than the sum of its proper divisors (14731).

3890009 is a wasteful number, since it uses less digits than its factorization.

3890009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14730.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 3890009 is about 1972.3105739209. The cubic root of 3890009 is about 157.2715626796.

The spelling of 3890009 in words is "three million, eight hundred ninety thousand, nine".