548405449 has 4 divisors (see below), whose sum is σ = 548694036. Its totient is φ = 548116864.

The previous prime is 548405411. The next prime is 548405471. The reversal of 548405449 is 944504845.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 293779600 + 254625849 = 17140^2 + 15957^2 .

It is a cyclic number.

It is not a de Polignac number, because 548405449 - 2⁷ = 548405321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (548405149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141424 + ... + 145249.

It is an arithmetic number, because the mean of its divisors is an integer number (137173509).

Almost surely, 2^548405449 is an apocalyptic number.

It is an amenable number.

548405449 is a deficient number, since it is larger than the sum of its proper divisors (288587).

548405449 is a wasteful number, since it uses less digits than its factorization.

548405449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288586.

The product of its (nonzero) digits is 460800, while the sum is 43.

The square root of 548405449 is about 23418.0581816683. The cubic root of 548405449 is about 818.5287165797.

The spelling of 548405449 in words is "five hundred forty-eight million, four hundred five thousand, four hundred forty-nine".