549898985 has 4 divisors (see below), whose sum is σ = 659878788. Its totient is φ = 439919184.

The previous prime is 549898967. The next prime is 549898991. The reversal of 549898985 is 589898945.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113465104 + 436433881 = 10652^2 + 20891^2 .

It is a cyclic number.

It is not a de Polignac number, because 549898985 - 2⁸ = 549898729 is a prime.

It is a super-3 number, since 3×549898985³ (a number of 27 digits) contains 333 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54989894 + ... + 54989903.

It is an arithmetic number, because the mean of its divisors is an integer number (164969697).

Almost surely, 2^549898985 is an apocalyptic number.

It is an amenable number.

549898985 is a deficient number, since it is larger than the sum of its proper divisors (109979803).

549898985 is a wasteful number, since it uses less digits than its factorization.

549898985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109979802.

The product of its digits is 37324800, while the sum is 65.

The square root of 549898985 is about 23449.9250531851. The cubic root of 549898985 is about 819.2711076882.

The spelling of 549898985 in words is "five hundred forty-nine million, eight hundred ninety-eight thousand, nine hundred eighty-five".