3894409 has 2 divisors, whose sum is σ = 3894410. Its totient is φ = 3894408.

The previous prime is 3894391. The next prime is 3894419. The reversal of 3894409 is 9044983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3888784 + 5625 = 1972^2 + 75^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3894409 is a prime.

It is not a weakly prime, because it can be changed into another prime (3894419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1947204 + 1947205.

It is an arithmetic number, because the mean of its divisors is an integer number (1947205).

Almost surely, 2^3894409 is an apocalyptic number.

It is an amenable number.

3894409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3894409 is an equidigital number, since it uses as much as digits as its factorization.

3894409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 3894409 is about 1973.4257016670. The cubic root of 3894409 is about 157.3308371041.

The spelling of 3894409 in words is "three million, eight hundred ninety-four thousand, four hundred nine".