408561449 has 4 divisors (see below), whose sum is σ = 411500880. Its totient is φ = 405622020.

The previous prime is 408561409. The next prime is 408561457. The reversal of 408561449 is 944165804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408561449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408561409) 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 in 3 ways as a sum of consecutive naturals, for example, 1469507 + ... + 1469784.

It is an arithmetic number, because the mean of its divisors is an integer number (102875220).

Almost surely, 2^408561449 is an apocalyptic number.

It is an amenable number.

408561449 is a deficient number, since it is larger than the sum of its proper divisors (2939431).

408561449 is a wasteful number, since it uses less digits than its factorization.

408561449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939430.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 408561449 is about 20212.9030324691. The cubic root of 408561449 is about 742.0260093856.

The spelling of 408561449 in words is "four hundred eight million, five hundred sixty-one thousand, four hundred forty-nine".