16519423 has 2 divisors, whose sum is σ = 16519424. Its totient is φ = 16519422.

The previous prime is 16519421. The next prime is 16519463. The reversal of 16519423 is 32491561.

It is a weak prime.

It is an emirp because it is prime and its reverse (32491561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16519423 - 2¹ = 16519421 is a prime.

Together with 16519421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16519421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8259711 + 8259712.

It is an arithmetic number, because the mean of its divisors is an integer number (8259712).

Almost surely, 2^16519423 is an apocalyptic number.

16519423 is a deficient number, since it is larger than the sum of its proper divisors (1).

16519423 is an equidigital number, since it uses as much as digits as its factorization.

16519423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 16519423 is about 4064.4093051758. The cubic root of 16519423 is about 254.6820232403.

The spelling of 16519423 in words is "sixteen million, five hundred nineteen thousand, four hundred twenty-three".