548909819 has 2 divisors, whose sum is σ = 548909820. Its totient is φ = 548909818.

The previous prime is 548909813. The next prime is 548909827. The reversal of 548909819 is 918909845.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-548909819 is a prime.

It is a super-2 number, since 2×548909819² = 602603978789225522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (548909813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274454909 + 274454910.

It is an arithmetic number, because the mean of its divisors is an integer number (274454910).

Almost surely, 2^548909819 is an apocalyptic number.

548909819 is a deficient number, since it is larger than the sum of its proper divisors (1).

548909819 is an equidigital number, since it uses as much as digits as its factorization.

548909819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 53.

The square root of 548909819 is about 23428.8245330405. The cubic root of 548909819 is about 818.7795740614.

The spelling of 548909819 in words is "five hundred forty-eight million, nine hundred nine thousand, eight hundred nineteen".