16609393 has 2 divisors, whose sum is σ = 16609394. Its totient is φ = 16609392.

The previous prime is 16609361. The next prime is 16609403. The reversal of 16609393 is 39390661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13307904 + 3301489 = 3648^2 + 1817^2 .

It is a cyclic number.

It is not a de Polignac number, because 16609393 - 2⁵ = 16609361 is a prime.

It is not a weakly prime, because it can be changed into another prime (16609303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8304696 + 8304697.

It is an arithmetic number, because the mean of its divisors is an integer number (8304697).

Almost surely, 2^16609393 is an apocalyptic number.

It is an amenable number.

16609393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16609393 is an equidigital number, since it uses as much as digits as its factorization.

16609393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 16609393 is about 4075.4623050643. The cubic root of 16609393 is about 255.1435459893.

The spelling of 16609393 in words is "sixteen million, six hundred nine thousand, three hundred ninety-three".