16423647 has 4 divisors (see below), whose sum is σ = 21898200. Its totient is φ = 10949096.

The previous prime is 16423637. The next prime is 16423663. The reversal of 16423647 is 74632461.

It is a happy number.

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 16423647 - 2¹² = 16419551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16423637) 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, 2737272 + ... + 2737277.

It is an arithmetic number, because the mean of its divisors is an integer number (5474550).

Almost surely, 2^16423647 is an apocalyptic number.

16423647 is a deficient number, since it is larger than the sum of its proper divisors (5474553).

16423647 is an equidigital number, since it uses as much as digits as its factorization.

16423647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5474552.

The product of its digits is 24192, while the sum is 33.

The square root of 16423647 is about 4052.6098998053. The cubic root of 16423647 is about 254.1888720663.

The spelling of 16423647 in words is "sixteen million, four hundred twenty-three thousand, six hundred forty-seven".