555883721 has 2 divisors, whose sum is σ = 555883722. Its totient is φ = 555883720.

The previous prime is 555883693. The next prime is 555883733. The reversal of 555883721 is 127388555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284293321 + 271590400 = 16861^2 + 16480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555883721 is a prime.

It is a super-2 number, since 2×555883721² = 618013422545611682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (555883751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277941860 + 277941861.

It is an arithmetic number, because the mean of its divisors is an integer number (277941861).

Almost surely, 2^555883721 is an apocalyptic number.

It is an amenable number.

555883721 is a deficient number, since it is larger than the sum of its proper divisors (1).

555883721 is an equidigital number, since it uses as much as digits as its factorization.

555883721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336000, while the sum is 44.

The square root of 555883721 is about 23577.1864521618. The cubic root of 555883721 is about 822.2325246991.

The spelling of 555883721 in words is "five hundred fifty-five million, eight hundred eighty-three thousand, seven hundred twenty-one".