555977857 has 2 divisors, whose sum is σ = 555977858. Its totient is φ = 555977856.

The previous prime is 555977837. The next prime is 555977869. The reversal of 555977857 is 758779555.

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., 404170816 + 151807041 = 20104^2 + 12321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555977857 is a prime.

It is a super-2 number, since 2×555977857² = 618222754948624898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (555977837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277988928 + 277988929.

It is an arithmetic number, because the mean of its divisors is an integer number (277988929).

Almost surely, 2^555977857 is an apocalyptic number.

It is an amenable number.

555977857 is a deficient number, since it is larger than the sum of its proper divisors (1).

555977857 is an equidigital number, since it uses as much as digits as its factorization.

555977857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15435000, while the sum is 58.

The square root of 555977857 is about 23579.1827042415. The cubic root of 555977857 is about 822.2789356716.

The spelling of 555977857 in words is "five hundred fifty-five million, nine hundred seventy-seven thousand, eight hundred fifty-seven".