16699393 has 2 divisors, whose sum is σ = 16699394. Its totient is φ = 16699392.

The previous prime is 16699391. The next prime is 16699427. The reversal of 16699393 is 39399661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15460624 + 1238769 = 3932^2 + 1113^2 .

It is a cyclic number.

It is not a de Polignac number, because 16699393 - 2¹ = 16699391 is a prime.

Together with 16699391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16699391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8349696 + 8349697.

It is an arithmetic number, because the mean of its divisors is an integer number (8349697).

It is a Proth number, since it is equal to 4077 ⋅ 2¹² + 1 and 4077 < 2¹².

Almost surely, 2^16699393 is an apocalyptic number.

It is an amenable number.

16699393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16699393 is an equidigital number, since it uses as much as digits as its factorization.

16699393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 46.

The square root of 16699393 is about 4086.4890798826. The cubic root of 16699393 is about 255.6035581396.

The spelling of 16699393 in words is "sixteen million, six hundred ninety-nine thousand, three hundred ninety-three".