549977 has 2 divisors, whose sum is σ = 549978. Its totient is φ = 549976.

The previous prime is 549949. The next prime is 549979. The reversal of 549977 is 779945.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541696 + 8281 = 736^2 + 91^2 .

It is a cyclic number.

It is not a de Polignac number, because 549977 - 2¹⁰ = 548953 is a prime.

Together with 549979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (549979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274988 + 274989.

It is an arithmetic number, because the mean of its divisors is an integer number (274989).

2⁵⁴⁹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

549977 is a deficient number, since it is larger than the sum of its proper divisors (1).

549977 is an equidigital number, since it uses as much as digits as its factorization.

549977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 41.

The square root of 549977 is about 741.6043419506. The cubic root of 549977 is about 81.9309849599.

The spelling of 549977 in words is "five hundred forty-nine thousand, nine hundred seventy-seven".