549005761 has 4 divisors (see below), whose sum is σ = 552039124. Its totient is φ = 545972400.

The previous prime is 549005749. The next prime is 549005767. The reversal of 549005761 is 167500945.

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 139712400 + 409293361 = 11820^2 + 20231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549005761 is a prime.

It is a super-2 number, since 2×549005761² = 602814651222378242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 549005761.

It is not an unprimeable number, because it can be changed into a prime (549005767) 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, 1516410 + ... + 1516771.

It is an arithmetic number, because the mean of its divisors is an integer number (138009781).

Almost surely, 2^549005761 is an apocalyptic number.

It is an amenable number.

549005761 is a deficient number, since it is larger than the sum of its proper divisors (3033363).

549005761 is a wasteful number, since it uses less digits than its factorization.

549005761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033362.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 549005761 is about 23430.8719641417. The cubic root of 549005761 is about 818.8272751414.

The spelling of 549005761 in words is "five hundred forty-nine million, five thousand, seven hundred sixty-one".