16999959 has 8 divisors (see below), whose sum is σ = 22769152. Its totient is φ = 11282040.

The previous prime is 16999903. The next prime is 16999963. The reversal of 16999959 is 95999961.

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

It is not a de Polignac number, because 16999959 - 2¹⁵ = 16967191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16999899 and 16999908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16999999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12037 + ... + 13374.

It is an arithmetic number, because the mean of its divisors is an integer number (2846144).

Almost surely, 2^16999959 is an apocalyptic number.

16999959 is a deficient number, since it is larger than the sum of its proper divisors (5769193).

16999959 is a wasteful number, since it uses less digits than its factorization.

16999959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25637.

The product of its digits is 1771470, while the sum is 57.

The square root of 16999959 is about 4123.1006536343. The cubic root of 16999959 is about 257.1279523548.

It can be divided in two parts, 169 and 99959, that added together give a triangular number (100128 = T₄₄₇).

The spelling of 16999959 in words is "sixteen million, nine hundred ninety-nine thousand, nine hundred fifty-nine".