654543193 has 2 divisors, whose sum is σ = 654543194. Its totient is φ = 654543192.

The previous prime is 654543191. The next prime is 654543247. The reversal of 654543193 is 391345456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637461504 + 17081689 = 25248^2 + 4133^2 .

It is a cyclic number.

It is not a de Polignac number, because 654543193 - 2¹ = 654543191 is a prime.

Together with 654543191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (654543191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327271596 + 327271597.

It is an arithmetic number, because the mean of its divisors is an integer number (327271597).

Almost surely, 2^654543193 is an apocalyptic number.

It is an amenable number.

654543193 is a deficient number, since it is larger than the sum of its proper divisors (1).

654543193 is an equidigital number, since it uses as much as digits as its factorization.

654543193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 40.

The square root of 654543193 is about 25584.0417643499. The cubic root of 654543193 is about 868.2526221631.

The spelling of 654543193 in words is "six hundred fifty-four million, five hundred forty-three thousand, one hundred ninety-three".