16639123 has 2 divisors, whose sum is σ = 16639124. Its totient is φ = 16639122.

The previous prime is 16639111. The next prime is 16639163. The reversal of 16639123 is 32193661.

It is a weak prime.

It is an emirp because it is prime and its reverse (32193661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16639123 - 2¹³ = 16630931 is a prime.

It is not a weakly prime, because it can be changed into another prime (16639163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8319561 + 8319562.

It is an arithmetic number, because the mean of its divisors is an integer number (8319562).

Almost surely, 2^16639123 is an apocalyptic number.

16639123 is a deficient number, since it is larger than the sum of its proper divisors (1).

16639123 is an equidigital number, since it uses as much as digits as its factorization.

16639123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 31.

The square root of 16639123 is about 4079.1081133012. The cubic root of 16639123 is about 255.2956867344.

The spelling of 16639123 in words is "sixteen million, six hundred thirty-nine thousand, one hundred twenty-three".