493651819 has 2 divisors, whose sum is σ = 493651820. Its totient is φ = 493651818.

The previous prime is 493651811. The next prime is 493651841. The reversal of 493651819 is 918156394.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 493651819 - 2³ = 493651811 is a prime.

It is a super-2 number, since 2×493651819² = 487384236804017522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (493651811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246825909 + 246825910.

It is an arithmetic number, because the mean of its divisors is an integer number (246825910).

Almost surely, 2^493651819 is an apocalyptic number.

493651819 is a deficient number, since it is larger than the sum of its proper divisors (1).

493651819 is an equidigital number, since it uses as much as digits as its factorization.

493651819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 46.

The square root of 493651819 is about 22218.2766883483. The cubic root of 493651819 is about 790.3271726089.

The spelling of 493651819 in words is "four hundred ninety-three million, six hundred fifty-one thousand, eight hundred nineteen".