16988131 has 2 divisors, whose sum is σ = 16988132. Its totient is φ = 16988130.

The previous prime is 16988123. The next prime is 16988141. The reversal of 16988131 is 13188961.

It is a weak prime.

It is an emirp because it is prime and its reverse (13188961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16988131 - 2³ = 16988123 is a prime.

It is a super-2 number, since 2×16988131² = 577193189746322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16988141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8494065 + 8494066.

It is an arithmetic number, because the mean of its divisors is an integer number (8494066).

Almost surely, 2^16988131 is an apocalyptic number.

16988131 is a deficient number, since it is larger than the sum of its proper divisors (1).

16988131 is an equidigital number, since it uses as much as digits as its factorization.

16988131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 37.

The square root of 16988131 is about 4121.6660466370. Note that the first 3 decimals coincide. The cubic root of 16988131 is about 257.0683048572.

The spelling of 16988131 in words is "sixteen million, nine hundred eighty-eight thousand, one hundred thirty-one".