549815899 has 2 divisors, whose sum is σ = 549815900. Its totient is φ = 549815898.

The previous prime is 549815881. The next prime is 549815909. The reversal of 549815899 is 998518945.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 549815899 - 2²¹ = 547718747 is a prime.

It is not a weakly prime, because it can be changed into another prime (549815809) 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, 274907949 + 274907950.

It is an arithmetic number, because the mean of its divisors is an integer number (274907950).

Almost surely, 2^549815899 is an apocalyptic number.

549815899 is a deficient number, since it is larger than the sum of its proper divisors (1).

549815899 is an equidigital number, since it uses as much as digits as its factorization.

549815899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 58.

The square root of 549815899 is about 23448.1534240972. The cubic root of 549815899 is about 819.2298435108.

The spelling of 549815899 in words is "five hundred forty-nine million, eight hundred fifteen thousand, eight hundred ninety-nine".