497806409 has 2 divisors, whose sum is σ = 497806410. Its totient is φ = 497806408.

The previous prime is 497806391. The next prime is 497806417. The reversal of 497806409 is 904608794.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291453184 + 206353225 = 17072^2 + 14365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-497806409 is a prime.

It is a super-2 number, since 2×497806409² = 495622441682950562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (497806429) 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, 248903204 + 248903205.

It is an arithmetic number, because the mean of its divisors is an integer number (248903205).

Almost surely, 2^497806409 is an apocalyptic number.

It is an amenable number.

497806409 is a deficient number, since it is larger than the sum of its proper divisors (1).

497806409 is an equidigital number, since it uses as much as digits as its factorization.

497806409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 497806409 is about 22311.5756727310. The cubic root of 497806409 is about 792.5381215429.

The spelling of 497806409 in words is "four hundred ninety-seven million, eight hundred six thousand, four hundred nine".