409553491 has 2 divisors, whose sum is σ = 409553492. Its totient is φ = 409553490.

The previous prime is 409553413. The next prime is 409553509. The reversal of 409553491 is 194355904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409553491 - 2⁷ = 409553363 is a prime.

It is not a weakly prime, because it can be changed into another prime (409553191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204776745 + 204776746.

It is an arithmetic number, because the mean of its divisors is an integer number (204776746).

Almost surely, 2^409553491 is an apocalyptic number.

409553491 is a deficient number, since it is larger than the sum of its proper divisors (1).

409553491 is an equidigital number, since it uses as much as digits as its factorization.

409553491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 409553491 is about 20237.4279739299. The cubic root of 409553491 is about 742.6261035048.

The spelling of 409553491 in words is "four hundred nine million, five hundred fifty-three thousand, four hundred ninety-one".