549999959 has 2 divisors, whose sum is σ = 549999960. Its totient is φ = 549999958.

The previous prime is 549999937. The next prime is 550000001. The reversal of 549999959 is 959999945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 549999959 - 2²⁴ = 533222743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549999059) 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, 274999979 + 274999980.

It is an arithmetic number, because the mean of its divisors is an integer number (274999980).

Almost surely, 2^549999959 is an apocalyptic number.

549999959 is a deficient number, since it is larger than the sum of its proper divisors (1).

549999959 is an equidigital number, since it uses as much as digits as its factorization.

549999959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53144100, while the sum is 68.

The square root of 549999959 is about 23452.0779249942. The cubic root of 549999959 is about 819.3212502418.

The spelling of 549999959 in words is "five hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred fifty-nine".