1989037 has 4 divisors (see below), whose sum is σ = 2026620. Its totient is φ = 1951456.

The previous prime is 1989019. The next prime is 1989049. The reversal of 1989037 is 7309891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 617796 + 1371241 = 786^2 + 1171^2 .

It is a cyclic number.

It is not a de Polignac number, because 1989037 - 2¹¹ = 1986989 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1988987 and 1989005.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18712 + ... + 18817.

It is an arithmetic number, because the mean of its divisors is an integer number (506655).

2^1989037 is an apocalyptic number.

It is an amenable number.

1989037 is a deficient number, since it is larger than the sum of its proper divisors (37583).

1989037 is an equidigital number, since it uses as much as digits as its factorization.

1989037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37582.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1989037 is about 1410.3322303628. The cubic root of 1989037 is about 125.7614744999.

The spelling of 1989037 in words is "one million, nine hundred eighty-nine thousand, thirty-seven".