555005491 has 2 divisors, whose sum is σ = 555005492. Its totient is φ = 555005490.

The previous prime is 555005471. The next prime is 555005527. The reversal of 555005491 is 194500555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 555005491 - 2⁵ = 555005459 is a prime.

It is not a weakly prime, because it can be changed into another prime (555005401) 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, 277502745 + 277502746.

It is an arithmetic number, because the mean of its divisors is an integer number (277502746).

Almost surely, 2^555005491 is an apocalyptic number.

555005491 is a deficient number, since it is larger than the sum of its proper divisors (1).

555005491 is an equidigital number, since it uses as much as digits as its factorization.

555005491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 555005491 is about 23558.5545184759. The cubic root of 555005491 is about 821.7992866800.

The spelling of 555005491 in words is "five hundred fifty-five million, five thousand, four hundred ninety-one".