405053549 has 2 divisors, whose sum is σ = 405053550. Its totient is φ = 405053548.

The previous prime is 405053513. The next prime is 405053557. The reversal of 405053549 is 945350504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374693449 + 30360100 = 19357^2 + 5510^2 .

It is a cyclic number.

It is not a de Polignac number, because 405053549 - 2⁸ = 405053293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405053599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202526774 + 202526775.

It is an arithmetic number, because the mean of its divisors is an integer number (202526775).

Almost surely, 2^405053549 is an apocalyptic number.

It is an amenable number.

405053549 is a deficient number, since it is larger than the sum of its proper divisors (1).

405053549 is an equidigital number, since it uses as much as digits as its factorization.

405053549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 405053549 is about 20125.9421891250. The cubic root of 405053549 is about 739.8962290573.

The spelling of 405053549 in words is "four hundred five million, fifty-three thousand, five hundred forty-nine".