493818389 has 2 divisors, whose sum is σ = 493818390. Its totient is φ = 493818388.

The previous prime is 493818383. The next prime is 493818421. The reversal of 493818389 is 983818394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 486555364 + 7263025 = 22058^2 + 2695^2 .

It is a cyclic number.

It is not a de Polignac number, because 493818389 - 2⁴ = 493818373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 493818389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493818383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246909194 + 246909195.

It is an arithmetic number, because the mean of its divisors is an integer number (246909195).

Almost surely, 2^493818389 is an apocalyptic number.

It is an amenable number.

493818389 is a deficient number, since it is larger than the sum of its proper divisors (1).

493818389 is an equidigital number, since it uses as much as digits as its factorization.

493818389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 53.

The square root of 493818389 is about 22222.0248627347. The cubic root of 493818389 is about 790.4160544133.

The spelling of 493818389 in words is "four hundred ninety-three million, eight hundred eighteen thousand, three hundred eighty-nine".