3898409 has 2 divisors, whose sum is σ = 3898410. Its totient is φ = 3898408.

The previous prime is 3898393. The next prime is 3898417. The reversal of 3898409 is 9048983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3052009 + 846400 = 1747^2 + 920^2 .

It is an emirp because it is prime and its reverse (9048983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3898409 - 2⁴ = 3898393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3898459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1949204 + 1949205.

It is an arithmetic number, because the mean of its divisors is an integer number (1949205).

Almost surely, 2^3898409 is an apocalyptic number.

It is an amenable number.

3898409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3898409 is an equidigital number, since it uses as much as digits as its factorization.

3898409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 3898409 is about 1974.4389076393. The cubic root of 3898409 is about 157.3846842141.

The spelling of 3898409 in words is "three million, eight hundred ninety-eight thousand, four hundred nine".