16969691 has 2 divisors, whose sum is σ = 16969692. Its totient is φ = 16969690.

The previous prime is 16969663. The next prime is 16969697. The reversal of 16969691 is 19696961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16969691 - 2⁶ = 16969627 is a prime.

It is a Sophie Germain prime.

16969691 is a strobogrammatic number because it is the same when read upside-down.

It is not a weakly prime, because it can be changed into another prime (16969697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8484845 + 8484846.

It is an arithmetic number, because the mean of its divisors is an integer number (8484846).

Almost surely, 2^16969691 is an apocalyptic number.

16969691 is a deficient number, since it is larger than the sum of its proper divisors (1).

16969691 is an equidigital number, since it uses as much as digits as its factorization.

16969691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 47.

The square root of 16969691 is about 4119.4284797773. The cubic root of 16969691 is about 256.9752584094.

The spelling of 16969691 in words is "sixteen million, nine hundred sixty-nine thousand, six hundred ninety-one".