548632813 has 2 divisors, whose sum is σ = 548632814. Its totient is φ = 548632812.

The previous prime is 548632811. The next prime is 548632853. The reversal of 548632813 is 318236845.

548632813 = 16562² + 16563².

It is an a-pointer prime, because the next prime (548632853) can be obtained adding 548632813 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274332969 + 274299844 = 16563^2 + 16562^2 .

It is a cyclic number.

It is not a de Polignac number, because 548632813 - 2¹ = 548632811 is a prime.

Together with 548632811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (548632811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274316406 + 274316407.

It is an arithmetic number, because the mean of its divisors is an integer number (274316407).

Almost surely, 2^548632813 is an apocalyptic number.

548632813 is the 16563-rd centered square number.

It is an amenable number.

548632813 is a deficient number, since it is larger than the sum of its proper divisors (1).

548632813 is an equidigital number, since it uses as much as digits as its factorization.

548632813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 40.

The square root of 548632813 is about 23422.9121374777. The cubic root of 548632813 is about 818.6418191819.

The spelling of 548632813 in words is "five hundred forty-eight million, six hundred thirty-two thousand, eight hundred thirteen".