1989206 has 4 divisors (see below), whose sum is σ = 2983812. Its totient is φ = 994602.

The previous prime is 1989203. The next prime is 1989217. The reversal of 1989206 is 6029891.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497300 + ... + 497303.

It is an arithmetic number, because the mean of its divisors is an integer number (745953).

2^1989206 is an apocalyptic number.

1989206 is a deficient number, since it is larger than the sum of its proper divisors (994606).

1989206 is an equidigital number, since it uses as much as digits as its factorization.

1989206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994605.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1989206 is about 1410.3921440507. The cubic root of 1989206 is about 125.7650362046.

The spelling of 1989206 in words is "one million, nine hundred eighty-nine thousand, two hundred six".