16865393 has 2 divisors, whose sum is σ = 16865394. Its totient is φ = 16865392.

The previous prime is 16865389. The next prime is 16865413. The reversal of 16865393 is 39356861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8958049 + 7907344 = 2993^2 + 2812^2 .

It is a cyclic number.

It is not a de Polignac number, because 16865393 - 2² = 16865389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16865393.

It is not a weakly prime, because it can be changed into another prime (16865353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8432696 + 8432697.

It is an arithmetic number, because the mean of its divisors is an integer number (8432697).

Almost surely, 2^16865393 is an apocalyptic number.

It is an amenable number.

16865393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16865393 is an equidigital number, since it uses as much as digits as its factorization.

16865393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 16865393 is about 4106.7496880136. The cubic root of 16865393 is about 256.4477079797.

The spelling of 16865393 in words is "sixteen million, eight hundred sixty-five thousand, three hundred ninety-three".