1994489 has 4 divisors (see below), whose sum is σ = 2279424. Its totient is φ = 1709556.

The previous prime is 1994483. The next prime is 1994497. The reversal of 1994489 is 9844991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9844991 = 13 ⋅757307.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1994489 is a prime.

It is a super-2 number, since 2×1994489² = 7955972742242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1994483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142457 + ... + 142470.

It is an arithmetic number, because the mean of its divisors is an integer number (569856).

2^1994489 is an apocalyptic number.

It is an amenable number.

1994489 is a deficient number, since it is larger than the sum of its proper divisors (284935).

1994489 is an equidigital number, since it uses as much as digits as its factorization.

1994489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284934.

The product of its digits is 93312, while the sum is 44.

The square root of 1994489 is about 1412.2637855585. The cubic root of 1994489 is about 125.8762747858.

The spelling of 1994489 in words is "one million, nine hundred ninety-four thousand, four hundred eighty-nine".