16489973 has 4 divisors (see below), whose sum is σ = 16736160. Its totient is φ = 16243788.

The previous prime is 16489937. The next prime is 16489981. The reversal of 16489973 is 37998461.

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 16489973 - 2¹⁰ = 16488949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16489273) 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, 122993 + ... + 123126.

It is an arithmetic number, because the mean of its divisors is an integer number (4184040).

Almost surely, 2^16489973 is an apocalyptic number.

It is an amenable number.

16489973 is a deficient number, since it is larger than the sum of its proper divisors (246187).

16489973 is an equidigital number, since it uses as much as digits as its factorization.

16489973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246186.

The product of its digits is 326592, while the sum is 47.

The square root of 16489973 is about 4060.7847763702. The cubic root of 16489973 is about 254.5305884291.

The spelling of 16489973 in words is "sixteen million, four hundred eighty-nine thousand, nine hundred seventy-three".