1989713 has 4 divisors (see below), whose sum is σ = 2170608. Its totient is φ = 1808820.

The previous prime is 1989683. The next prime is 1989721. The reversal of 1989713 is 3179891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1989713 - 2¹⁰ = 1988689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1989413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90431 + ... + 90452.

It is an arithmetic number, because the mean of its divisors is an integer number (542652).

2^1989713 is an apocalyptic number.

It is an amenable number.

1989713 is a deficient number, since it is larger than the sum of its proper divisors (180895).

1989713 is a wasteful number, since it uses less digits than its factorization.

1989713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180894.

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

The square root of 1989713 is about 1410.5718698457. The cubic root of 1989713 is about 125.7757201085.

The spelling of 1989713 in words is "one million, nine hundred eighty-nine thousand, seven hundred thirteen".