16999131 has 4 divisors (see below), whose sum is σ = 22665512. Its totient is φ = 11332752.

The previous prime is 16999123. The next prime is 16999181. The reversal of 16999131 is 13199961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13199961 = 3 ⋅4399987.

It is not a de Polignac number, because 16999131 - 2³ = 16999123 is a prime.

It is a super-2 number, since 2×16999131² = 577940909510322, which contains 22 as substring.

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 16999131.

It is not an unprimeable number, because it can be changed into a prime (16999121) 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, 2833186 + ... + 2833191.

It is an arithmetic number, because the mean of its divisors is an integer number (5666378).

Almost surely, 2^16999131 is an apocalyptic number.

16999131 is a deficient number, since it is larger than the sum of its proper divisors (5666381).

16999131 is an equidigital number, since it uses as much as digits as its factorization.

16999131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5666380.

The product of its digits is 13122, while the sum is 39.

The square root of 16999131 is about 4123.0002425418. Note that the first 3 decimals coincide. The cubic root of 16999131 is about 257.1237777290.

The spelling of 16999131 in words is "sixteen million, nine hundred ninety-nine thousand, one hundred thirty-one".