16697797 has 2 divisors, whose sum is σ = 16697798. Its totient is φ = 16697796.

The previous prime is 16697773. The next prime is 16697843. The reversal of 16697797 is 79779661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16695396 + 2401 = 4086^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 16697797 - 2⁷ = 16697669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16697497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8348898 + 8348899.

It is an arithmetic number, because the mean of its divisors is an integer number (8348899).

Almost surely, 2^16697797 is an apocalyptic number.

It is an amenable number.

16697797 is a deficient number, since it is larger than the sum of its proper divisors (1).

16697797 is an equidigital number, since it uses as much as digits as its factorization.

16697797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1000188, while the sum is 52.

The square root of 16697797 is about 4086.2937975628. The cubic root of 16697797 is about 255.5954150038.

The spelling of 16697797 in words is "sixteen million, six hundred ninety-seven thousand, seven hundred ninety-seven".