555661339 has 2 divisors, whose sum is σ = 555661340. Its totient is φ = 555661338.

The previous prime is 555661331. The next prime is 555661343. The reversal of 555661339 is 933166555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 555661339 - 2³ = 555661331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 555661295 and 555661304.

It is not a weakly prime, because it can be changed into another prime (555661331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277830669 + 277830670.

It is an arithmetic number, because the mean of its divisors is an integer number (277830670).

Almost surely, 2^555661339 is an apocalyptic number.

555661339 is a deficient number, since it is larger than the sum of its proper divisors (1).

555661339 is an equidigital number, since it uses as much as digits as its factorization.

555661339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 364500, while the sum is 43.

The square root of 555661339 is about 23572.4699384685. The cubic root of 555661339 is about 822.1228650138.

The spelling of 555661339 in words is "five hundred fifty-five million, six hundred sixty-one thousand, three hundred thirty-nine".