16879809 has 8 divisors (see below), whose sum is σ = 23691040. Its totient is φ = 10660896.

The previous prime is 16879801. The next prime is 16879831. The reversal of 16879809 is 90897861.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16879809 - 2³ = 16879801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16879801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148012 + ... + 148125.

It is an arithmetic number, because the mean of its divisors is an integer number (2961380).

Almost surely, 2^16879809 is an apocalyptic number.

16879809 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16879809 is a deficient number, since it is larger than the sum of its proper divisors (6811231).

16879809 is a wasteful number, since it uses less digits than its factorization.

16879809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296159.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 16879809 is about 4108.5044724328. The cubic root of 16879809 is about 256.5207549446.

The spelling of 16879809 in words is "sixteen million, eight hundred seventy-nine thousand, eight hundred nine".