549667897 has 2 divisors, whose sum is σ = 549667898. Its totient is φ = 549667896.

The previous prime is 549667879. The next prime is 549667901. The reversal of 549667897 is 798766945.

Together with previous prime (549667879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 289136016 + 260531881 = 17004^2 + 16141^2 .

It is a cyclic number.

It is not a de Polignac number, because 549667897 - 2¹¹ = 549665849 is a prime.

It is not a weakly prime, because it can be changed into another prime (549664897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274833948 + 274833949.

It is an arithmetic number, because the mean of its divisors is an integer number (274833949).

Almost surely, 2^549667897 is an apocalyptic number.

It is an amenable number.

549667897 is a deficient number, since it is larger than the sum of its proper divisors (1).

549667897 is an equidigital number, since it uses as much as digits as its factorization.

549667897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 61.

The square root of 549667897 is about 23444.9972702067. The cubic root of 549667897 is about 819.1563288813.

It can be divided in two parts, 549667 and 897, that added together give a square (550564 = 742²).

The spelling of 549667897 in words is "five hundred forty-nine million, six hundred sixty-seven thousand, eight hundred ninety-seven".