556177949 has 2 divisors, whose sum is σ = 556177950. Its totient is φ = 556177948.

The previous prime is 556177891. The next prime is 556177981. The reversal of 556177949 is 949771655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361380100 + 194797849 = 19010^2 + 13957^2 .

It is a cyclic number.

It is not a de Polignac number, because 556177949 - 2⁸ = 556177693 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 556177949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556177249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278088974 + 278088975.

It is an arithmetic number, because the mean of its divisors is an integer number (278088975).

Almost surely, 2^556177949 is an apocalyptic number.

It is an amenable number.

556177949 is a deficient number, since it is larger than the sum of its proper divisors (1).

556177949 is an equidigital number, since it uses as much as digits as its factorization.

556177949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2381400, while the sum is 53.

The square root of 556177949 is about 23583.4253025297. The cubic root of 556177949 is about 822.3775677189.

The spelling of 556177949 in words is "five hundred fifty-six million, one hundred seventy-seven thousand, nine hundred forty-nine".