16651039 has 4 divisors (see below), whose sum is σ = 16933320. Its totient is φ = 16368760.

The previous prime is 16651021. The next prime is 16651051. The reversal of 16651039 is 93015661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93015661 = 6091 ⋅15271.

It is a cyclic number.

It is not a de Polignac number, because 16651039 - 2⁷ = 16650911 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16651039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16651009) 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, 141052 + ... + 141169.

It is an arithmetic number, because the mean of its divisors is an integer number (4233330).

Almost surely, 2^16651039 is an apocalyptic number.

16651039 is a deficient number, since it is larger than the sum of its proper divisors (282281).

16651039 is an equidigital number, since it uses as much as digits as its factorization.

16651039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282280.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 16651039 is about 4080.5684652999. The cubic root of 16651039 is about 255.3566149755.

It can be divided in two parts, 1665 and 1039, that added together give a square (2704 = 52²).

The spelling of 16651039 in words is "sixteen million, six hundred fifty-one thousand, thirty-nine".