16442623 has 4 divisors (see below), whose sum is σ = 17009640. Its totient is φ = 15875608.

The previous prime is 16442609. The next prime is 16442659. The reversal of 16442623 is 32624461.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16442623 is a prime.

It is a super-3 number, since 3×16442623³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16442591 and 16442600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16442663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283465 + ... + 283522.

It is an arithmetic number, because the mean of its divisors is an integer number (4252410).

Almost surely, 2^16442623 is an apocalyptic number.

16442623 is a deficient number, since it is larger than the sum of its proper divisors (567017).

16442623 is an equidigital number, since it uses as much as digits as its factorization.

16442623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567016.

The product of its digits is 6912, while the sum is 28.

The square root of 16442623 is about 4054.9504312630. The cubic root of 16442623 is about 254.2867316045.

The spelling of 16442623 in words is "sixteen million, four hundred forty-two thousand, six hundred twenty-three".