16623287 has 4 divisors (see below), whose sum is σ = 16787976. Its totient is φ = 16458600.

The previous prime is 16623281. The next prime is 16623311. The reversal of 16623287 is 78232661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78232661 = 13 ⋅6017897.

It is a cyclic number.

It is not a de Polignac number, because 16623287 - 2⁸ = 16623031 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 (16623281) 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, 82193 + ... + 82394.

It is an arithmetic number, because the mean of its divisors is an integer number (4196994).

Almost surely, 2^16623287 is an apocalyptic number.

16623287 is a deficient number, since it is larger than the sum of its proper divisors (164689).

16623287 is a wasteful number, since it uses less digits than its factorization.

16623287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164688.

The product of its digits is 24192, while the sum is 35.

The square root of 16623287 is about 4077.1665406260. The cubic root of 16623287 is about 255.2146699294.

The spelling of 16623287 in words is "sixteen million, six hundred twenty-three thousand, two hundred eighty-seven".