556938493 has 2 divisors, whose sum is σ = 556938494. Its totient is φ = 556938492.

The previous prime is 556938461. The next prime is 556938511. The reversal of 556938493 is 394839655.

556938493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544848964 + 12089529 = 23342^2 + 3477^2 .

It is a cyclic number.

It is not a de Polignac number, because 556938493 - 2⁵ = 556938461 is a prime.

It is a super-2 number, since 2×556938493² = 620360969970222098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 556938493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556938433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278469246 + 278469247.

It is an arithmetic number, because the mean of its divisors is an integer number (278469247).

Almost surely, 2^556938493 is an apocalyptic number.

It is an amenable number.

556938493 is a deficient number, since it is larger than the sum of its proper divisors (1).

556938493 is an equidigital number, since it uses as much as digits as its factorization.

556938493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3499200, while the sum is 52.

The square root of 556938493 is about 23599.5443388215. The cubic root of 556938493 is about 822.7522496292.

The spelling of 556938493 in words is "five hundred fifty-six million, nine hundred thirty-eight thousand, four hundred ninety-three".