550559899 has 2 divisors, whose sum is σ = 550559900. Its totient is φ = 550559898.

The previous prime is 550559897. The next prime is 550559923. The reversal of 550559899 is 998955055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 550559899 - 2¹ = 550559897 is a prime.

Together with 550559897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (550559897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275279949 + 275279950.

It is an arithmetic number, because the mean of its divisors is an integer number (275279950).

Almost surely, 2^550559899 is an apocalyptic number.

550559899 is a deficient number, since it is larger than the sum of its proper divisors (1).

550559899 is an equidigital number, since it uses as much as digits as its factorization.

550559899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645000, while the sum is 55.

The square root of 550559899 is about 23464.0128494680. The cubic root of 550559899 is about 819.5991988331.

It can be divided in two parts, 55055 and 9899, that multiplied together give a palindrome (544989445).

The spelling of 550559899 in words is "five hundred fifty million, five hundred fifty-nine thousand, eight hundred ninety-nine".