493387261 has 2 divisors, whose sum is σ = 493387262. Its totient is φ = 493387260.

The previous prime is 493387199. The next prime is 493387273. The reversal of 493387261 is 162783394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442892025 + 50495236 = 21045^2 + 7106^2 .

It is a cyclic number.

It is not a de Polignac number, because 493387261 - 2⁷ = 493387133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493387061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246693630 + 246693631.

It is an arithmetic number, because the mean of its divisors is an integer number (246693631).

Almost surely, 2^493387261 is an apocalyptic number.

It is an amenable number.

493387261 is a deficient number, since it is larger than the sum of its proper divisors (1).

493387261 is an equidigital number, since it uses as much as digits as its factorization.

493387261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 493387261 is about 22212.3222784111. The cubic root of 493387261 is about 790.1859632716.

The spelling of 493387261 in words is "four hundred ninety-three million, three hundred eighty-seven thousand, two hundred sixty-one".