549891005 has 4 divisors (see below), whose sum is σ = 659869212. Its totient is φ = 439912800.

The previous prime is 549890987. The next prime is 549891007. The reversal of 549891005 is 500198945.

It is a happy number.

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 246678436 + 303212569 = 15706^2 + 17413^2 .

It is not a de Polignac number, because 549891005 - 2¹⁶ = 549825469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549891007) 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, 54989096 + ... + 54989105.

It is an arithmetic number, because the mean of its divisors is an integer number (164967303).

Almost surely, 2^549891005 is an apocalyptic number.

It is an amenable number.

549891005 is a deficient number, since it is larger than the sum of its proper divisors (109978207).

549891005 is a wasteful number, since it uses less digits than its factorization.

549891005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109978206.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 549891005 is about 23449.7549027703. The cubic root of 549891005 is about 819.2671446482.

The spelling of 549891005 in words is "five hundred forty-nine million, eight hundred ninety-one thousand, five".