16969697 has 2 divisors, whose sum is σ = 16969698. Its totient is φ = 16969696.

The previous prime is 16969691. The next prime is 16969721. The reversal of 16969697 is 79696961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14776336 + 2193361 = 3844^2 + 1481^2 .

It is an emirp because it is prime and its reverse (79696961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16969697 - 2⁶ = 16969633 is a prime.

It is not a weakly prime, because it can be changed into another prime (16969691) 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, 8484848 + 8484849.

It is an arithmetic number, because the mean of its divisors is an integer number (8484849).

Almost surely, 2^16969697 is an apocalyptic number.

It is an amenable number.

16969697 is a deficient number, since it is larger than the sum of its proper divisors (1).

16969697 is an equidigital number, since it uses as much as digits as its factorization.

16969697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 53.

The square root of 16969697 is about 4119.4292080336. The cubic root of 16969697 is about 256.9752886958.

The spelling of 16969697 in words is "sixteen million, nine hundred sixty-nine thousand, six hundred ninety-seven".