549665999 has 2 divisors, whose sum is σ = 549666000. Its totient is φ = 549665998.

The previous prime is 549665951. The next prime is 549666023. The reversal of 549665999 is 999566945.

549665999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 549665999 - 2²⁰ = 548617423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549665939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274832999 + 274833000.

It is an arithmetic number, because the mean of its divisors is an integer number (274833000).

Almost surely, 2^549665999 is an apocalyptic number.

549665999 is a deficient number, since it is larger than the sum of its proper divisors (1).

549665999 is an equidigital number, since it uses as much as digits as its factorization.

549665999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23619600, while the sum is 62.

The square root of 549665999 is about 23444.9567924533. The cubic root of 549665999 is about 819.1553860329.

The spelling of 549665999 in words is "five hundred forty-nine million, six hundred sixty-five thousand, nine hundred ninety-nine".