550661197 has 2 divisors, whose sum is σ = 550661198. Its totient is φ = 550661196.

The previous prime is 550661183. The next prime is 550661203. The reversal of 550661197 is 791166055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332478756 + 218182441 = 18234^2 + 14771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550661197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550661597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275330598 + 275330599.

It is an arithmetic number, because the mean of its divisors is an integer number (275330599).

Almost surely, 2^550661197 is an apocalyptic number.

It is an amenable number.

550661197 is a deficient number, since it is larger than the sum of its proper divisors (1).

550661197 is an equidigital number, since it uses as much as digits as its factorization.

550661197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 550661197 is about 23466.1713323669. The cubic root of 550661197 is about 819.6494620097.

The spelling of 550661197 in words is "five hundred fifty million, six hundred sixty-one thousand, one hundred ninety-seven".