1989937 has 8 divisors (see below), whose sum is σ = 2090880. Its totient is φ = 1890240.

The previous prime is 1989919. The next prime is 1989947. The reversal of 1989937 is 7399891.

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 1989937 - 2¹¹ = 1987889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1989947) 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, 5364 + ... + 5722.

It is an arithmetic number, because the mean of its divisors is an integer number (261360).

2^1989937 is an apocalyptic number.

It is an amenable number.

1989937 is a deficient number, since it is larger than the sum of its proper divisors (100943).

1989937 is a wasteful number, since it uses less digits than its factorization.

1989937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623.

The product of its digits is 122472, while the sum is 46.

The square root of 1989937 is about 1410.6512680319. The cubic root of 1989937 is about 125.7804398351.

Subtracting from 1989937 its sum of digits (46), we obtain a palindrome (1989891).

It can be divided in two parts, 1989 and 937, that added together give a triangular number (2926 = T₇₆).

The spelling of 1989937 in words is "one million, nine hundred eighty-nine thousand, nine hundred thirty-seven".