16505323 has 2 divisors, whose sum is σ = 16505324. Its totient is φ = 16505322.

The previous prime is 16505303. The next prime is 16505339. The reversal of 16505323 is 32350561.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (32350561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16505323 is a prime.

It is not a weakly prime, because it can be changed into another prime (16505303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252661 + 8252662.

It is an arithmetic number, because the mean of its divisors is an integer number (8252662).

Almost surely, 2^16505323 is an apocalyptic number.

16505323 is a deficient number, since it is larger than the sum of its proper divisors (1).

16505323 is an equidigital number, since it uses as much as digits as its factorization.

16505323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 16505323 is about 4062.6743654888. The cubic root of 16505323 is about 254.6095421230.

Adding to 16505323 its reverse (32350561), we get a palindrome (48855884).

The spelling of 16505323 in words is "sixteen million, five hundred five thousand, three hundred twenty-three".