19690169 has 2 divisors, whose sum is σ = 19690170. Its totient is φ = 19690168.

The previous prime is 19690147. The next prime is 19690171. The reversal of 19690169 is 96109691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15642025 + 4048144 = 3955^2 + 2012^2 .

It is a cyclic number.

It is not a de Polignac number, because 19690169 - 2⁸ = 19689913 is a prime.

It is a super-2 number, since 2×19690169² = 775405510497122, which contains 22 as substring.

Together with 19690171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19693169) 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, 9845084 + 9845085.

It is an arithmetic number, because the mean of its divisors is an integer number (9845085).

Almost surely, 2^19690169 is an apocalyptic number.

It is an amenable number.

19690169 is a deficient number, since it is larger than the sum of its proper divisors (1).

19690169 is an equidigital number, since it uses as much as digits as its factorization.

19690169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 19690169 is about 4437.3605893594. The cubic root of 19690169 is about 270.0327760851.

The spelling of 19690169 in words is "nineteen million, six hundred ninety thousand, one hundred sixty-nine".