405551449 has 2 divisors, whose sum is σ = 405551450. Its totient is φ = 405551448.

The previous prime is 405551437. The next prime is 405551467. The reversal of 405551449 is 944155504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405015625 + 535824 = 20125^2 + 732^2 .

It is a cyclic number.

It is not a de Polignac number, because 405551449 - 2¹¹ = 405549401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (405551149) 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, 202775724 + 202775725.

It is an arithmetic number, because the mean of its divisors is an integer number (202775725).

Almost surely, 2^405551449 is an apocalyptic number.

It is an amenable number.

405551449 is a deficient number, since it is larger than the sum of its proper divisors (1).

405551449 is an equidigital number, since it uses as much as digits as its factorization.

405551449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 405551449 is about 20138.3079974461. The cubic root of 405551449 is about 740.1992700506.

The spelling of 405551449 in words is "four hundred five million, five hundred fifty-one thousand, four hundred forty-nine".