550549999 has 2 divisors, whose sum is σ = 550550000. Its totient is φ = 550549998.

The previous prime is 550549991. The next prime is 550550003. The reversal of 550549999 is 999945055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 550549999 - 2³ = 550549991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550549991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275274999 + 275275000.

It is an arithmetic number, because the mean of its divisors is an integer number (275275000).

Almost surely, 2^550549999 is an apocalyptic number.

550549999 is a deficient number, since it is larger than the sum of its proper divisors (1).

550549999 is an equidigital number, since it uses as much as digits as its factorization.

550549999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3280500, while the sum is 55.

The square root of 550549999 is about 23463.8018871623. The cubic root of 550549999 is about 819.5942862095.

The spelling of 550549999 in words is "five hundred fifty million, five hundred forty-nine thousand, nine hundred ninety-nine".