549339845 has 8 divisors (see below), whose sum is σ = 659504376. Its totient is φ = 439274176.

The previous prime is 549339839. The next prime is 549339863. The reversal of 549339845 is 548933945.

It is a happy number.

It is a Cunningham number, because it is equal to 23438²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 188073796 + 361266049 = 13714^2 + 19007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 549339845 - 2⁶ = 549339781 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 549339793 and 549339802.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11882 + ... + 35211.

It is an arithmetic number, because the mean of its divisors is an integer number (82438047).

Almost surely, 2^549339845 is an apocalyptic number.

It is an amenable number.

549339845 is a deficient number, since it is larger than the sum of its proper divisors (110164531).

549339845 is a wasteful number, since it uses less digits than its factorization.

549339845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49431.

The product of its digits is 2332800, while the sum is 50.

The square root of 549339845 is about 23438.0000213329. Note that the first 4 decimals coincide. The cubic root of 549339845 is about 818.9933338854.

The spelling of 549339845 in words is "five hundred forty-nine million, three hundred thirty-nine thousand, eight hundred forty-five".