556050991 has 2 divisors, whose sum is σ = 556050992. Its totient is φ = 556050990.

The previous prime is 556050983. The next prime is 556051019. The reversal of 556050991 is 199050655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556050991 - 2³ = 556050983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556050961) 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, 278025495 + 278025496.

It is an arithmetic number, because the mean of its divisors is an integer number (278025496).

Almost surely, 2^556050991 is an apocalyptic number.

556050991 is a deficient number, since it is larger than the sum of its proper divisors (1).

556050991 is an equidigital number, since it uses as much as digits as its factorization.

556050991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60750, while the sum is 40.

The square root of 556050991 is about 23580.7334703567. The cubic root of 556050991 is about 822.3149886128.

The spelling of 556050991 in words is "five hundred fifty-six million, fifty thousand, nine hundred ninety-one".