16725139 has 2 divisors, whose sum is σ = 16725140. Its totient is φ = 16725138.

The previous prime is 16725119. The next prime is 16725173. The reversal of 16725139 is 93152761.

It is an a-pointer prime, because the next prime (16725173) can be obtained adding 16725139 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16725139 is a prime.

It is not a weakly prime, because it can be changed into another prime (16725109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8362569 + 8362570.

It is an arithmetic number, because the mean of its divisors is an integer number (8362570).

Almost surely, 2^16725139 is an apocalyptic number.

16725139 is a deficient number, since it is larger than the sum of its proper divisors (1).

16725139 is an equidigital number, since it uses as much as digits as its factorization.

16725139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 34.

The square root of 16725139 is about 4089.6380035402. The cubic root of 16725139 is about 255.7348481446.

The spelling of 16725139 in words is "sixteen million, seven hundred twenty-five thousand, one hundred thirty-nine".