243192493 has 2 divisors, whose sum is σ = 243192494. Its totient is φ = 243192492.

The previous prime is 243192491. The next prime is 243192503. The reversal of 243192493 is 394291342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233570089 + 9622404 = 15283^2 + 3102^2 .

It is a cyclic number.

It is not a de Polignac number, because 243192493 - 2¹ = 243192491 is a prime.

Together with 243192491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243192491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121596246 + 121596247.

It is an arithmetic number, because the mean of its divisors is an integer number (121596247).

Almost surely, 2^243192493 is an apocalyptic number.

It is an amenable number.

243192493 is a deficient number, since it is larger than the sum of its proper divisors (1).

243192493 is an equidigital number, since it uses as much as digits as its factorization.

243192493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 37.

The square root of 243192493 is about 15594.6302617279. The cubic root of 243192493 is about 624.1898777368.

The spelling of 243192493 in words is "two hundred forty-three million, one hundred ninety-two thousand, four hundred ninety-three".