556713491 has 2 divisors, whose sum is σ = 556713492. Its totient is φ = 556713490.

The previous prime is 556713473. The next prime is 556713527. The reversal of 556713491 is 194317655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556713491 - 2²⁶ = 489604627 is a prime.

It is a super-2 number, since 2×556713491² = 619859822122814162, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (556713401) 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, 278356745 + 278356746.

It is an arithmetic number, because the mean of its divisors is an integer number (278356746).

Almost surely, 2^556713491 is an apocalyptic number.

556713491 is a deficient number, since it is larger than the sum of its proper divisors (1).

556713491 is an equidigital number, since it uses as much as digits as its factorization.

556713491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The square root of 556713491 is about 23594.7767736845. The cubic root of 556713491 is about 822.6414379693.

The spelling of 556713491 in words is "five hundred fifty-six million, seven hundred thirteen thousand, four hundred ninety-one".