549660559 has 4 divisors (see below), whose sum is σ = 628183504. Its totient is φ = 471137616.

The previous prime is 549660539. The next prime is 549660583. The reversal of 549660559 is 955066945.

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

It is a cyclic number.

It is not a de Polignac number, because 549660559 - 2⁷ = 549660431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549660539) 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, 39261462 + ... + 39261475.

It is an arithmetic number, because the mean of its divisors is an integer number (157045876).

Almost surely, 2^549660559 is an apocalyptic number.

549660559 is a deficient number, since it is larger than the sum of its proper divisors (78522945).

549660559 is an equidigital number, since it uses as much as digits as its factorization.

549660559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78522944.

The product of its (nonzero) digits is 1458000, while the sum is 49.

The square root of 549660559 is about 23444.8407757442. The cubic root of 549660559 is about 819.1526836524.

The spelling of 549660559 in words is "five hundred forty-nine million, six hundred sixty thousand, five hundred fifty-nine".