493722409 has 2 divisors, whose sum is σ = 493722410. Its totient is φ = 493722408.

The previous prime is 493722407. The next prime is 493722469. The reversal of 493722409 is 904227394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416282409 + 77440000 = 20403^2 + 8800^2 .

It is a cyclic number.

It is not a de Polignac number, because 493722409 - 2¹ = 493722407 is a prime.

Together with 493722407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (493722407) 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, 246861204 + 246861205.

It is an arithmetic number, because the mean of its divisors is an integer number (246861205).

Almost surely, 2^493722409 is an apocalyptic number.

It is an amenable number.

493722409 is a deficient number, since it is larger than the sum of its proper divisors (1).

493722409 is an equidigital number, since it uses as much as digits as its factorization.

493722409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 493722409 is about 22219.8651886099. The cubic root of 493722409 is about 790.3648418959.

The spelling of 493722409 in words is "four hundred ninety-three million, seven hundred twenty-two thousand, four hundred nine".