1996489 has 4 divisors (see below), whose sum is σ = 2178000. Its totient is φ = 1814980.

The previous prime is 1996487. The next prime is 1996507. The reversal of 1996489 is 9846991.

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.

It is a cyclic number.

It is not a de Polignac number, because 1996489 - 2¹ = 1996487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1996481) 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 3 ways as a sum of consecutive naturals, for example, 90739 + ... + 90760.

It is an arithmetic number, because the mean of its divisors is an integer number (544500).

2^1996489 is an apocalyptic number.

It is an amenable number.

1996489 is a deficient number, since it is larger than the sum of its proper divisors (181511).

1996489 is a wasteful number, since it uses less digits than its factorization.

1996489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181510.

The product of its digits is 139968, while the sum is 46.

The square root of 1996489 is about 1412.9716911531. The cubic root of 1996489 is about 125.9183354250.

It can be divided in two parts, 1996 and 489, that added together give a triangular number (2485 = T₇₀).

The spelling of 1996489 in words is "one million, nine hundred ninety-six thousand, four hundred eighty-nine".