555588961 has 2 divisors, whose sum is σ = 555588962. Its totient is φ = 555588960.

The previous prime is 555588959. The next prime is 555588973. The reversal of 555588961 is 169885555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549433600 + 6155361 = 23440^2 + 2481^2 .

It is a cyclic number.

It is not a de Polignac number, because 555588961 - 2¹ = 555588959 is a prime.

Together with 555588959, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 555588899 and 555588908.

It is not a weakly prime, because it can be changed into another prime (555588361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277794480 + 277794481.

It is an arithmetic number, because the mean of its divisors is an integer number (277794481).

Almost surely, 2^555588961 is an apocalyptic number.

It is an amenable number.

555588961 is a deficient number, since it is larger than the sum of its proper divisors (1).

555588961 is an equidigital number, since it uses as much as digits as its factorization.

555588961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160000, while the sum is 52.

The square root of 555588961 is about 23570.9346653882. The cubic root of 555588961 is about 822.0871680953.

The spelling of 555588961 in words is "five hundred fifty-five million, five hundred eighty-eight thousand, nine hundred sixty-one".