493181863 has 2 divisors, whose sum is σ = 493181864. Its totient is φ = 493181862.

The previous prime is 493181861. The next prime is 493181867. The reversal of 493181863 is 368181394.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 493181863 - 2¹ = 493181861 is a prime.

Together with 493181861, 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 (493181861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246590931 + 246590932.

It is an arithmetic number, because the mean of its divisors is an integer number (246590932).

Almost surely, 2^493181863 is an apocalyptic number.

493181863 is a deficient number, since it is larger than the sum of its proper divisors (1).

493181863 is an equidigital number, since it uses as much as digits as its factorization.

493181863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 493181863 is about 22207.6982823525. The cubic root of 493181863 is about 790.0762961083.

The spelling of 493181863 in words is "four hundred ninety-three million, one hundred eighty-one thousand, eight hundred sixty-three".