548662813 has 2 divisors, whose sum is σ = 548662814. Its totient is φ = 548662812.

The previous prime is 548662801. The next prime is 548662847. The reversal of 548662813 is 318266845.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 482109849 + 66552964 = 21957^2 + 8158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-548662813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 548662813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (548662883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274331406 + 274331407.

It is an arithmetic number, because the mean of its divisors is an integer number (274331407).

Almost surely, 2^548662813 is an apocalyptic number.

It is an amenable number.

548662813 is a deficient number, since it is larger than the sum of its proper divisors (1).

548662813 is an equidigital number, since it uses as much as digits as its factorization.

548662813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 43.

The square root of 548662813 is about 23423.5525273175. The cubic root of 548662813 is about 818.6567403984.

The spelling of 548662813 in words is "five hundred forty-eight million, six hundred sixty-two thousand, eight hundred thirteen".