16990469 has 2 divisors, whose sum is σ = 16990470. Its totient is φ = 16990468.

The previous prime is 16990459. The next prime is 16990489. The reversal of 16990469 is 96409961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13786369 + 3204100 = 3713^2 + 1790^2 .

It is an emirp because it is prime and its reverse (96409961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16990469 - 2⁸ = 16990213 is a prime.

It is a super-2 number, since 2×16990469² = 577352073679922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16990439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8495234 + 8495235.

It is an arithmetic number, because the mean of its divisors is an integer number (8495235).

Almost surely, 2^16990469 is an apocalyptic number.

It is an amenable number.

16990469 is a deficient number, since it is larger than the sum of its proper divisors (1).

16990469 is an equidigital number, since it uses as much as digits as its factorization.

16990469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 16990469 is about 4121.9496600517. The cubic root of 16990469 is about 257.0800973674.

The spelling of 16990469 in words is "sixteen million, nine hundred ninety thousand, four hundred sixty-nine".