16999138 has 16 divisors (see below), whose sum is σ = 27543096. Its totient is φ = 7822080.

The previous prime is 16999123. The next prime is 16999181. The reversal of 16999138 is 83199961.

It can be written as a sum of positive squares in 4 ways, for example, as 2505889 + 14493249 = 1583^2 + 3807^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10170 + ... + 11722.

Almost surely, 2^16999138 is an apocalyptic number.

16999138 is a deficient number, since it is larger than the sum of its proper divisors (10543958).

16999138 is a wasteful number, since it uses less digits than its factorization.

16999138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989.

The product of its digits is 104976, while the sum is 46.

The square root of 16999138 is about 4123.0010914381. The cubic root of 16999138 is about 257.1238130223.

The spelling of 16999138 in words is "sixteen million, nine hundred ninety-nine thousand, one hundred thirty-eight".