1994389 has 12 divisors (see below), whose sum is σ = 2171104. Its totient is φ = 1831104.

The previous prime is 1994387. The next prime is 1994413. The reversal of 1994389 is 9834991.

It is not a de Polignac number, because 1994389 - 2¹ = 1994387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994381) 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 in 11 ways as a sum of consecutive naturals, for example, 19312 + ... + 19414.

2^1994389 is an apocalyptic number.

It is an amenable number.

1994389 is a deficient number, since it is larger than the sum of its proper divisors (176715).

1994389 is a wasteful number, since it uses less digits than its factorization.

1994389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 187 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 1994389 is about 1412.2283809639. The cubic root of 1994389 is about 125.8741710159.

The spelling of 1994389 in words is "one million, nine hundred ninety-four thousand, three hundred eighty-nine".