556391393 has 2 divisors, whose sum is σ = 556391394. Its totient is φ = 556391392.

The previous prime is 556391359. The next prime is 556391399. The reversal of 556391393 is 393193655.

556391393 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., 537451489 + 18939904 = 23183^2 + 4352^2 .

It is a cyclic number.

It is not a de Polignac number, because 556391393 - 2¹⁴ = 556375009 is a prime.

It is not a weakly prime, because it can be changed into another prime (556391399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278195696 + 278195697.

It is an arithmetic number, because the mean of its divisors is an integer number (278195697).

Almost surely, 2^556391393 is an apocalyptic number.

It is an amenable number.

556391393 is a deficient number, since it is larger than the sum of its proper divisors (1).

556391393 is an equidigital number, since it uses as much as digits as its factorization.

556391393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 328050, while the sum is 44.

The square root of 556391393 is about 23587.9501652857. The cubic root of 556391393 is about 822.4827553410.

The spelling of 556391393 in words is "five hundred fifty-six million, three hundred ninety-one thousand, three hundred ninety-three".