16640593 has 2 divisors, whose sum is σ = 16640594. Its totient is φ = 16640592.

The previous prime is 16640581. The next prime is 16640621. The reversal of 16640593 is 39504661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15499969 + 1140624 = 3937^2 + 1068^2 .

It is a cyclic number.

It is not a de Polignac number, because 16640593 - 2⁹ = 16640081 is a prime.

It is not a weakly prime, because it can be changed into another prime (16640513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8320296 + 8320297.

It is an arithmetic number, because the mean of its divisors is an integer number (8320297).

Almost surely, 2^16640593 is an apocalyptic number.

It is an amenable number.

16640593 is a deficient number, since it is larger than the sum of its proper divisors (1).

16640593 is an equidigital number, since it uses as much as digits as its factorization.

16640593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 16640593 is about 4079.2882957693. The cubic root of 16640593 is about 255.3032046308.

The spelling of 16640593 in words is "sixteen million, six hundred forty thousand, five hundred ninety-three".