2193664193 has 6 divisors (see below), whose sum is σ = 2551813506. Its totient is φ = 1880283552.

The previous prime is 2193664183. The next prime is 2193664201. The reversal of 2193664193 is 3914663912.

It can be written as a sum of positive squares in only one way, i.e., 1650634384 + 543029809 = 40628^2 + 23303^2 .

It is not a de Polignac number, because 2193664193 - 2⁸ = 2193663937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2193664163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22384280 + ... + 22384377.

It is an arithmetic number, because the mean of its divisors is an integer number (425302251).

Almost surely, 2^2193664193 is an apocalyptic number.

It is an amenable number.

2193664193 is a deficient number, since it is larger than the sum of its proper divisors (358149313).

2193664193 is an equidigital number, since it uses as much as digits as its factorization.

2193664193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44768671 (or 44768664 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 2193664193 is about 46836.5689712643. The cubic root of 2193664193 is about 1299.3417166215.

The spelling of 2193664193 in words is "two billion, one hundred ninety-three million, six hundred sixty-four thousand, one hundred ninety-three".