3899309 has 2 divisors, whose sum is σ = 3899310. Its totient is φ = 3899308.

The previous prime is 3899299. The next prime is 3899321. The reversal of 3899309 is 9039983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3822025 + 77284 = 1955^2 + 278^2 .

It is an emirp because it is prime and its reverse (9039983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3899309 - 2⁸ = 3899053 is a prime.

It is a super-2 number, since 2×3899309² = 30409221354962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3899339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1949654 + 1949655.

It is an arithmetic number, because the mean of its divisors is an integer number (1949655).

Almost surely, 2^3899309 is an apocalyptic number.

It is an amenable number.

3899309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3899309 is an equidigital number, since it uses as much as digits as its factorization.

3899309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 3899309 is about 1974.6668073374. Note that the first 3 decimals coincide. The cubic root of 3899309 is about 157.3967947372.

The spelling of 3899309 in words is "three million, eight hundred ninety-nine thousand, three hundred nine".