494256409 has 2 divisors, whose sum is σ = 494256410. Its totient is φ = 494256408.

The previous prime is 494256401. The next prime is 494256421. The reversal of 494256409 is 904652494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354945600 + 139310809 = 18840^2 + 11803^2 .

It is a cyclic number.

It is not a de Polignac number, because 494256409 - 2³ = 494256401 is a prime.

It is not a weakly prime, because it can be changed into another prime (494256401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247128204 + 247128205.

It is an arithmetic number, because the mean of its divisors is an integer number (247128205).

Almost surely, 2^494256409 is an apocalyptic number.

It is an amenable number.

494256409 is a deficient number, since it is larger than the sum of its proper divisors (1).

494256409 is an equidigital number, since it uses as much as digits as its factorization.

494256409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 494256409 is about 22231.8782157514. The cubic root of 494256409 is about 790.6496866773.

The spelling of 494256409 in words is "four hundred ninety-four million, two hundred fifty-six thousand, four hundred nine".