549853809 has 4 divisors (see below), whose sum is σ = 733138416. Its totient is φ = 366569204.

The previous prime is 549853807. The next prime is 549853823. The reversal of 549853809 is 908358945.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 549853809 - 2¹ = 549853807 is a prime.

It is a super-2 number, since 2×549853809² = 604678422543616962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (549853807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91642299 + ... + 91642304.

It is an arithmetic number, because the mean of its divisors is an integer number (183284604).

Almost surely, 2^549853809 is an apocalyptic number.

It is an amenable number.

549853809 is a deficient number, since it is larger than the sum of its proper divisors (183284607).

549853809 is a wasteful number, since it uses less digits than its factorization.

549853809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183284606.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The square root of 549853809 is about 23448.9617893842. The cubic root of 549853809 is about 819.2486718068.

The spelling of 549853809 in words is "five hundred forty-nine million, eight hundred fifty-three thousand, eight hundred nine".