493178939249 has 2 divisors, whose sum is σ = 493178939250. Its totient is φ = 493178939248.

The previous prime is 493178939243. The next prime is 493178939299. The reversal of 493178939249 is 942939871394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 403742055649 + 89436883600 = 635407^2 + 299060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-493178939249 is a prime.

It is a super-2 number, since 2×493178939249² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (493178939243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246589469624 + 246589469625.

It is an arithmetic number, because the mean of its divisors is an integer number (246589469625).

Almost surely, 2^493178939249 is an apocalyptic number.

It is an amenable number.

493178939249 is a deficient number, since it is larger than the sum of its proper divisors (1).

493178939249 is an equidigital number, since it uses as much as digits as its factorization.

493178939249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105815808, while the sum is 68.

The spelling of 493178939249 in words is "four hundred ninety-three billion, one hundred seventy-eight million, nine hundred thirty-nine thousand, two hundred forty-nine".