16440623 has 2 divisors, whose sum is σ = 16440624. Its totient is φ = 16440622.

The previous prime is 16440601. The next prime is 16440629. The reversal of 16440623 is 32604461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16440623 - 2¹⁶ = 16375087 is a prime.

It is a super-3 number, since 3×16440623³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16440592 and 16440601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16440629) 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 as a sum of consecutive naturals, namely, 8220311 + 8220312.

It is an arithmetic number, because the mean of its divisors is an integer number (8220312).

Almost surely, 2^16440623 is an apocalyptic number.

16440623 is a deficient number, since it is larger than the sum of its proper divisors (1).

16440623 is an equidigital number, since it uses as much as digits as its factorization.

16440623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 16440623 is about 4054.7038116242. The cubic root of 16440623 is about 254.2764211229.

The spelling of 16440623 in words is "sixteen million, four hundred forty thousand, six hundred twenty-three".