16538723 has 4 divisors (see below), whose sum is σ = 16559928. Its totient is φ = 16517520.

The previous prime is 16538713. The next prime is 16538737. The reversal of 16538723 is 32783561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32783561 = 103 ⋅318287.

It is a cyclic number.

It is not a de Polignac number, because 16538723 - 2⁶ = 16538659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16538713) 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, 9386 + ... + 11007.

It is an arithmetic number, because the mean of its divisors is an integer number (4139982).

Almost surely, 2^16538723 is an apocalyptic number.

16538723 is a deficient number, since it is larger than the sum of its proper divisors (21205).

16538723 is an equidigital number, since it uses as much as digits as its factorization.

16538723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21204.

The product of its digits is 30240, while the sum is 35.

The square root of 16538723 is about 4066.7828808531. The cubic root of 16538723 is about 254.7811681488.

The spelling of 16538723 in words is "sixteen million, five hundred thirty-eight thousand, seven hundred twenty-three".