549243949 has 8 divisors (see below), whose sum is σ = 554743800. Its totient is φ = 543768576.

The previous prime is 549243943. The next prime is 549243953. The reversal of 549243949 is 949342945.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3087049 + 546156900 = 1757^2 + 23370^2 .

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 549243949 - 2⁵ = 549243917 is a prime.

It is a super-2 number, since 2×549243949² = 603337831026229202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549243943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40749 + ... + 52525.

It is an arithmetic number, because the mean of its divisors is an integer number (69342975).

Almost surely, 2^549243949 is an apocalyptic number.

It is an amenable number.

549243949 is a deficient number, since it is larger than the sum of its proper divisors (5499851).

549243949 is a wasteful number, since it uses less digits than its factorization.

549243949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12239.

The product of its digits is 1399680, while the sum is 49.

The square root of 549243949 is about 23435.9541943570. The cubic root of 549243949 is about 818.9456750114.

The spelling of 549243949 in words is "five hundred forty-nine million, two hundred forty-three thousand, nine hundred forty-nine".