16991167 has 2 divisors, whose sum is σ = 16991168. Its totient is φ = 16991166.

The previous prime is 16991159. The next prime is 16991171. The reversal of 16991167 is 76119961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16991167 - 2³ = 16991159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16991137) 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, 8495583 + 8495584.

It is an arithmetic number, because the mean of its divisors is an integer number (8495584).

Almost surely, 2^16991167 is an apocalyptic number.

16991167 is a deficient number, since it is larger than the sum of its proper divisors (1).

16991167 is an equidigital number, since it uses as much as digits as its factorization.

16991167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 40.

The square root of 16991167 is about 4122.0343278532. The cubic root of 16991167 is about 257.0836177617.

The spelling of 16991167 in words is "sixteen million, nine hundred ninety-one thousand, one hundred sixty-seven".