493941781 has 2 divisors, whose sum is σ = 493941782. Its totient is φ = 493941780.

The previous prime is 493941761. The next prime is 493941793. The reversal of 493941781 is 187149394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 435556900 + 58384881 = 20870^2 + 7641^2 .

It is a cyclic number.

It is not a de Polignac number, because 493941781 - 2⁷ = 493941653 is a prime.

It is a super-2 number, since 2×493941781² = 487956966034903922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493941761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246970890 + 246970891.

It is an arithmetic number, because the mean of its divisors is an integer number (246970891).

Almost surely, 2^493941781 is an apocalyptic number.

It is an amenable number.

493941781 is a deficient number, since it is larger than the sum of its proper divisors (1).

493941781 is an equidigital number, since it uses as much as digits as its factorization.

493941781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 493941781 is about 22224.8010339800. The cubic root of 493941781 is about 790.4818835370.

The spelling of 493941781 in words is "four hundred ninety-three million, nine hundred forty-one thousand, seven hundred eighty-one".