1996889 has 4 divisors (see below), whose sum is σ = 2039424. Its totient is φ = 1954356.

The previous prime is 1996879. The next prime is 1996901. The reversal of 1996889 is 9886991.

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 a de Polignac number, because none of the positive numbers 2^k-1996889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1996829) 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, 21197 + ... + 21290.

It is an arithmetic number, because the mean of its divisors is an integer number (509856).

2^1996889 is an apocalyptic number.

It is an amenable number.

1996889 is a deficient number, since it is larger than the sum of its proper divisors (42535).

1996889 is an equidigital number, since it uses as much as digits as its factorization.

1996889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42534.

The product of its digits is 279936, while the sum is 50.

The square root of 1996889 is about 1413.1132297166. The cubic root of 1996889 is about 125.9267441817.

The spelling of 1996889 in words is "one million, nine hundred ninety-six thousand, eight hundred eighty-nine".