549372913 has 2 divisors, whose sum is σ = 549372914. Its totient is φ = 549372912.

The previous prime is 549372911. The next prime is 549372919. The reversal of 549372913 is 319273945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 546016689 + 3356224 = 23367^2 + 1832^2 .

It is a cyclic number.

It is not a de Polignac number, because 549372913 - 2¹ = 549372911 is a prime.

Together with 549372911, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 549372913.

It is not a weakly prime, because it can be changed into another prime (549372911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274686456 + 274686457.

It is an arithmetic number, because the mean of its divisors is an integer number (274686457).

Almost surely, 2^549372913 is an apocalyptic number.

It is an amenable number.

549372913 is a deficient number, since it is larger than the sum of its proper divisors (1).

549372913 is an equidigital number, since it uses as much as digits as its factorization.

549372913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 549372913 is about 23438.7054463338. The cubic root of 549372913 is about 819.0097668994.

The spelling of 549372913 in words is "five hundred forty-nine million, three hundred seventy-two thousand, nine hundred thirteen".