1989371 has 8 divisors (see below), whose sum is σ = 2074800. Its totient is φ = 1905120.

The previous prime is 1989353. The next prime is 1989401. The reversal of 1989371 is 1739891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1989371 - 2⁶ = 1989307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1989341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5060 + ... + 5438.

It is an arithmetic number, because the mean of its divisors is an integer number (259350).

2^1989371 is an apocalyptic number.

1989371 is a deficient number, since it is larger than the sum of its proper divisors (85429).

1989371 is a wasteful number, since it uses less digits than its factorization.

1989371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589.

The product of its digits is 13608, while the sum is 38.

The square root of 1989371 is about 1410.4506372078. The cubic root of 1989371 is about 125.7685134140.

The spelling of 1989371 in words is "one million, nine hundred eighty-nine thousand, three hundred seventy-one".