549999897 has 16 divisors (see below), whose sum is σ = 805493760. Its totient is φ = 332264592.

The previous prime is 549999893. The next prime is 549999911. The reversal of 549999897 is 798999945.

It is not a de Polignac number, because 549999897 - 2² = 549999893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is not an unprimeable number, because it can be changed into a prime (549999893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208453 + ... + 211074.

It is an arithmetic number, because the mean of its divisors is an integer number (50343360).

Almost surely, 2^549999897 is an apocalyptic number.

549999897 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

549999897 is a deficient number, since it is larger than the sum of its proper divisors (255493863).

549999897 is a wasteful number, since it uses less digits than its factorization.

549999897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419572.

The product of its digits is 66134880, while the sum is 69.

The square root of 549999897 is about 23452.0766031497. The cubic root of 549999897 is about 819.3212194551.

The spelling of 549999897 in words is "five hundred forty-nine million, nine hundred ninety-nine thousand, eight hundred ninety-seven".