16396997 has 2 divisors, whose sum is σ = 16396998. Its totient is φ = 16396996.

The previous prime is 16396987. The next prime is 16397009. The reversal of 16396997 is 79969361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11383876 + 5013121 = 3374^2 + 2239^2 .

16396997 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 16396997 - 2⁸ = 16396741 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16396927) 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, 8198498 + 8198499.

It is an arithmetic number, because the mean of its divisors is an integer number (8198499).

Almost surely, 2^16396997 is an apocalyptic number.

It is an amenable number.

16396997 is a deficient number, since it is larger than the sum of its proper divisors (1).

16396997 is an equidigital number, since it uses as much as digits as its factorization.

16396997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 551124, while the sum is 50.

The square root of 16396997 is about 4049.3205602916. The cubic root of 16396997 is about 254.0513102368.

The spelling of 16396997 in words is "sixteen million, three hundred ninety-six thousand, nine hundred ninety-seven".