1989607 has 4 divisors (see below), whose sum is σ = 2038176. Its totient is φ = 1941040.

The previous prime is 1989583. The next prime is 1989613. The reversal of 1989607 is 7069891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7069891 = 31 ⋅228061.

It is a cyclic number.

It is not a de Polignac number, because 1989607 - 2⁷ = 1989479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1989607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989007) 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, 24223 + ... + 24304.

It is an arithmetic number, because the mean of its divisors is an integer number (509544).

2^1989607 is an apocalyptic number.

1989607 is a deficient number, since it is larger than the sum of its proper divisors (48569).

1989607 is an equidigital number, since it uses as much as digits as its factorization.

1989607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48568.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1989607 is about 1410.5342959319. The cubic root of 1989607 is about 125.7734865429.

The spelling of 1989607 in words is "one million, nine hundred eighty-nine thousand, six hundred seven".