646702193 has 2 divisors, whose sum is σ = 646702194. Its totient is φ = 646702192.

The previous prime is 646702181. The next prime is 646702223. The reversal of 646702193 is 391207646.

646702193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 596971489 + 49730704 = 24433^2 + 7052^2 .

It is a cyclic number.

It is not a de Polignac number, because 646702193 - 2¹⁰ = 646701169 is a prime.

It is not a weakly prime, because it can be changed into another prime (646702153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323351096 + 323351097.

It is an arithmetic number, because the mean of its divisors is an integer number (323351097).

Almost surely, 2^646702193 is an apocalyptic number.

It is an amenable number.

646702193 is a deficient number, since it is larger than the sum of its proper divisors (1).

646702193 is an equidigital number, since it uses as much as digits as its factorization.

646702193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 646702193 is about 25430.3400095241. The cubic root of 646702193 is about 864.7716518878.

The spelling of 646702193 in words is "six hundred forty-six million, seven hundred two thousand, one hundred ninety-three".