16009723 has 4 divisors (see below), whose sum is σ = 16852360. Its totient is φ = 15167088.

The previous prime is 16009687. The next prime is 16009729. The reversal of 16009723 is 32790061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32790061 = 1471 ⋅22291.

It is a cyclic number.

It is not a de Polignac number, because 16009723 - 2⁹ = 16009211 is a prime.

It is a super-2 number, since 2×16009723² = 512622461073458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16009691 and 16009700.

It is not an unprimeable number, because it can be changed into a prime (16009729) 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, 421290 + ... + 421327.

It is an arithmetic number, because the mean of its divisors is an integer number (4213090).

Almost surely, 2^16009723 is an apocalyptic number.

16009723 is a deficient number, since it is larger than the sum of its proper divisors (842637).

16009723 is an equidigital number, since it uses as much as digits as its factorization.

16009723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842636.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 16009723 is about 4001.2151904140. The cubic root of 16009723 is about 252.0352421947.

Adding to 16009723 its reverse (32790061), we get a palindrome (48799784).

The spelling of 16009723 in words is "sixteen million, nine thousand, seven hundred twenty-three".