493989439 has 2 divisors, whose sum is σ = 493989440. Its totient is φ = 493989438.

The previous prime is 493989421. The next prime is 493989491. The reversal of 493989439 is 934989394.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 493989439 - 2¹¹ = 493987391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493989499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246994719 + 246994720.

It is an arithmetic number, because the mean of its divisors is an integer number (246994720).

Almost surely, 2^493989439 is an apocalyptic number.

493989439 is a deficient number, since it is larger than the sum of its proper divisors (1).

493989439 is an equidigital number, since it uses as much as digits as its factorization.

493989439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7558272, while the sum is 58.

The square root of 493989439 is about 22225.8731886961. The cubic root of 493989439 is about 790.5073059487.

The spelling of 493989439 in words is "four hundred ninety-three million, nine hundred eighty-nine thousand, four hundred thirty-nine".