556334491 has 2 divisors, whose sum is σ = 556334492. Its totient is φ = 556334490.

The previous prime is 556334417. The next prime is 556334507. The reversal of 556334491 is 194433655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 556334491 - 2²⁹ = 19463579 is a prime.

It is not a weakly prime, because it can be changed into another prime (556334291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278167245 + 278167246.

It is an arithmetic number, because the mean of its divisors is an integer number (278167246).

Almost surely, 2^556334491 is an apocalyptic number.

556334491 is a deficient number, since it is larger than the sum of its proper divisors (1).

556334491 is an equidigital number, since it uses as much as digits as its factorization.

556334491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 40.

The square root of 556334491 is about 23586.7439677460. The cubic root of 556334491 is about 822.4547160208.

The spelling of 556334491 in words is "five hundred fifty-six million, three hundred thirty-four thousand, four hundred ninety-one".