549545477 has 4 divisors (see below), whose sum is σ = 591818220. Its totient is φ = 507272736.

The previous prime is 549545459. The next prime is 549545489. The reversal of 549545477 is 774545945.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 774545945 = 5 ⋅154909189.

It can be written as a sum of positive squares in 2 ways, for example, as 131997121 + 417548356 = 11489^2 + 20434^2 .

It is a cyclic number.

It is not a de Polignac number, because 549545477 - 2¹⁶ = 549479941 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 (549545377) 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, 21136352 + ... + 21136377.

It is an arithmetic number, because the mean of its divisors is an integer number (147954555).

Almost surely, 2^549545477 is an apocalyptic number.

It is an amenable number.

549545477 is a deficient number, since it is larger than the sum of its proper divisors (42272743).

549545477 is a wasteful number, since it uses less digits than its factorization.

549545477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42272742.

The product of its digits is 3528000, while the sum is 50.

The square root of 549545477 is about 23442.3863333066. The cubic root of 549545477 is about 819.0955112106.

The spelling of 549545477 in words is "five hundred forty-nine million, five hundred forty-five thousand, four hundred seventy-seven".