1894609 has 2 divisors, whose sum is σ = 1894610. Its totient is φ = 1894608.

The previous prime is 1894603. The next prime is 1894631. The reversal of 1894609 is 9064981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1134225 + 760384 = 1065^2 + 872^2 .

It is an emirp because it is prime and its reverse (9064981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1894609 - 2³ = 1894601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1894601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947304 + 947305.

It is an arithmetic number, because the mean of its divisors is an integer number (947305).

2^1894609 is an apocalyptic number.

It is an amenable number.

1894609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894609 is an equidigital number, since it uses as much as digits as its factorization.

1894609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1894609 is about 1376.4479648719. The cubic root of 1894609 is about 123.7389800751.

The spelling of 1894609 in words is "one million, eight hundred ninety-four thousand, six hundred nine".