16431673 has 6 divisors (see below), whose sum is σ = 17455406. Its totient is φ = 15464832.

The previous prime is 16431659. The next prime is 16431689. The reversal of 16431673 is 37613461.

It can be written as a sum of positive squares in 3 ways, for example, as 5914624 + 10517049 = 2432^2 + 3243^2 .

It is not a de Polignac number, because 16431673 - 2⁹ = 16431161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16431473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28140 + ... + 28717.

Almost surely, 2^16431673 is an apocalyptic number.

It is an amenable number.

16431673 is a deficient number, since it is larger than the sum of its proper divisors (1023733).

16431673 is an equidigital number, since it uses as much as digits as its factorization.

16431673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56891 (or 56874 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The square root of 16431673 is about 4053.6000049339. The cubic root of 16431673 is about 254.2302714716.

The spelling of 16431673 in words is "sixteen million, four hundred thirty-one thousand, six hundred seventy-three".