16138723 has 4 divisors (see below), whose sum is σ = 16190928. Its totient is φ = 16086520.

The previous prime is 16138721. The next prime is 16138739. The reversal of 16138723 is 32783161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32783161 = 1733 ⋅18917.

It is a cyclic number.

It is not a de Polignac number, because 16138723 - 2¹ = 16138721 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16138721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25636 + ... + 26257.

It is an arithmetic number, because the mean of its divisors is an integer number (4047732).

Almost surely, 2^16138723 is an apocalyptic number.

16138723 is a deficient number, since it is larger than the sum of its proper divisors (52205).

16138723 is an equidigital number, since it uses as much as digits as its factorization.

16138723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52204.

The product of its digits is 6048, while the sum is 31.

The square root of 16138723 is about 4017.3029509859. The cubic root of 16138723 is about 252.7103654861.

It can be divided in two parts, 16138 and 723, that added together give a palindrome (16861).

The spelling of 16138723 in words is "sixteen million, one hundred thirty-eight thousand, seven hundred twenty-three".