16317623 has 4 divisors (see below), whose sum is σ = 18648720. Its totient is φ = 13986528.

The previous prime is 16317619. The next prime is 16317641. The reversal of 16317623 is 32671361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16317623 - 2² = 16317619 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 (16317643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165538 + ... + 1165551.

It is an arithmetic number, because the mean of its divisors is an integer number (4662180).

Almost surely, 2^16317623 is an apocalyptic number.

16317623 is a deficient number, since it is larger than the sum of its proper divisors (2331097).

16317623 is an equidigital number, since it uses as much as digits as its factorization.

16317623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331096.

The product of its digits is 4536, while the sum is 29.

The square root of 16317623 is about 4039.5077670429. The cubic root of 16317623 is about 253.6407128044.

Adding to 16317623 its reverse (32671361), we get a palindrome (48988984).

The spelling of 16317623 in words is "sixteen million, three hundred seventeen thousand, six hundred twenty-three".