16991127 has 10 divisors (see below), whose sum is σ = 25381928. Its totient is φ = 11327364.

The previous prime is 16991119. The next prime is 16991137. The reversal of 16991127 is 72119961.

It is not a de Polignac number, because 16991127 - 2³ = 16991119 is a prime.

It is a super-3 number, since 3×16991127³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16991091 and 16991100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16991137) 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 9 ways as a sum of consecutive naturals, for example, 104803 + ... + 104964.

Almost surely, 2^16991127 is an apocalyptic number.

16991127 is a deficient number, since it is larger than the sum of its proper divisors (8390801).

16991127 is an equidigital number, since it uses as much as digits as its factorization.

16991127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209779 (or 209770 counting only the distinct ones).

The product of its digits is 6804, while the sum is 36.

The square root of 16991127 is about 4122.0294758771. The cubic root of 16991127 is about 257.0834160226.

The spelling of 16991127 in words is "sixteen million, nine hundred ninety-one thousand, one hundred twenty-seven".