549681243 has 8 divisors (see below), whose sum is σ = 756550656. Its totient is φ = 354633000.

The previous prime is 549681239. The next prime is 549681269. The reversal of 549681243 is 342186945.

549681243 = 2947² + 2948² + ... + 3008².

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

It is not a de Polignac number, because 549681243 - 2² = 549681239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 549681195 and 549681204.

It is not an unprimeable number, because it can be changed into a prime (549681203) 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, 2955183 + ... + 2955368.

It is an arithmetic number, because the mean of its divisors is an integer number (94568832).

Almost surely, 2^549681243 is an apocalyptic number.

549681243 is a deficient number, since it is larger than the sum of its proper divisors (206869413).

549681243 is a wasteful number, since it uses less digits than its factorization.

549681243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5910585.

The product of its digits is 207360, while the sum is 42.

The square root of 549681243 is about 23445.2818920993. The cubic root of 549681243 is about 819.1629585644.

The spelling of 549681243 in words is "five hundred forty-nine million, six hundred eighty-one thousand, two hundred forty-three".