16689079 has 4 divisors (see below), whose sum is σ = 18206280. Its totient is φ = 15171880.

The previous prime is 16689077. The next prime is 16689103. The reversal of 16689079 is 97098661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97098661 = 11 ⋅8827151.

It is a cyclic number.

It is not a de Polignac number, because 16689079 - 2¹ = 16689077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16689073) 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, 758584 + ... + 758605.

It is an arithmetic number, because the mean of its divisors is an integer number (4551570).

Almost surely, 2^16689079 is an apocalyptic number.

16689079 is a deficient number, since it is larger than the sum of its proper divisors (1517201).

16689079 is a wasteful number, since it uses less digits than its factorization.

16689079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517200.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 16689079 is about 4085.2269214818. The cubic root of 16689079 is about 255.5509247288.

The spelling of 16689079 in words is "sixteen million, six hundred eighty-nine thousand, seventy-nine".