16659397 has 2 divisors, whose sum is σ = 16659398. Its totient is φ = 16659396.

The previous prime is 16659367. The next prime is 16659413. The reversal of 16659397 is 79395661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10439361 + 6220036 = 3231^2 + 2494^2 .

It is a cyclic number.

It is not a de Polignac number, because 16659397 - 2¹¹ = 16657349 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 (16659317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8329698 + 8329699.

It is an arithmetic number, because the mean of its divisors is an integer number (8329699).

Almost surely, 2^16659397 is an apocalyptic number.

It is an amenable number.

16659397 is a deficient number, since it is larger than the sum of its proper divisors (1).

16659397 is an equidigital number, since it uses as much as digits as its factorization.

16659397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 46.

The square root of 16659397 is about 4081.5924588327. The cubic root of 16659397 is about 255.3993333026.

The spelling of 16659397 in words is "sixteen million, six hundred fifty-nine thousand, three hundred ninety-seven".