549964819 has 2 divisors, whose sum is σ = 549964820. Its totient is φ = 549964818.

The previous prime is 549964777. The next prime is 549964843. The reversal of 549964819 is 918469945.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 549964819 - 2⁷ = 549964691 is a prime.

It is a super-2 number, since 2×549964819² = 604922604275405522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 549964819.

It is not a weakly prime, because it can be changed into another prime (549964879) 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, 274982409 + 274982410.

It is an arithmetic number, because the mean of its divisors is an integer number (274982410).

Almost surely, 2^549964819 is an apocalyptic number.

549964819 is a deficient number, since it is larger than the sum of its proper divisors (1).

549964819 is an equidigital number, since it uses as much as digits as its factorization.

549964819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 55.

The square root of 549964819 is about 23451.3287256820. The cubic root of 549964819 is about 819.3038008090.

The spelling of 549964819 in words is "five hundred forty-nine million, nine hundred sixty-four thousand, eight hundred nineteen".