499555409 has 2 divisors, whose sum is σ = 499555410. Its totient is φ = 499555408.

The previous prime is 499555367. The next prime is 499555447. The reversal of 499555409 is 904555994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 497423809 + 2131600 = 22303^2 + 1460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499555409 is a prime.

It is a super-2 number, since 2×499555409² = 499111213322314562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (499555499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249777704 + 249777705.

It is an arithmetic number, because the mean of its divisors is an integer number (249777705).

Almost surely, 2^499555409 is an apocalyptic number.

It is an amenable number.

499555409 is a deficient number, since it is larger than the sum of its proper divisors (1).

499555409 is an equidigital number, since it uses as much as digits as its factorization.

499555409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458000, while the sum is 50.

The square root of 499555409 is about 22350.7362071141. The cubic root of 499555409 is about 793.4652081498.

The spelling of 499555409 in words is "four hundred ninety-nine million, five hundred fifty-five thousand, four hundred nine".