1894489 has 2 divisors, whose sum is σ = 1894490. Its totient is φ = 1894488.

The previous prime is 1894481. The next prime is 1894577. The reversal of 1894489 is 9844981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1734489 + 160000 = 1317^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1894489 - 2³ = 1894481 is a prime.

It is a super-2 number, since 2×1894489² = 7178177142242, which contains 22 as substring.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (1894481) 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, 947244 + 947245.

It is an arithmetic number, because the mean of its divisors is an integer number (947245).

2^1894489 is an apocalyptic number.

It is an amenable number.

1894489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894489 is an equidigital number, since it uses as much as digits as its factorization.

1894489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 43.

The square root of 1894489 is about 1376.4043737216. The cubic root of 1894489 is about 123.7363675763.

The spelling of 1894489 in words is "one million, eight hundred ninety-four thousand, four hundred eighty-nine".