556693 has 2 divisors, whose sum is σ = 556694. Its totient is φ = 556692.

The previous prime is 556691. The next prime is 556697. The reversal of 556693 is 396655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288369 + 268324 = 537^2 + 518^2 .

It is a cyclic number.

It is not a de Polignac number, because 556693 - 2¹ = 556691 is a prime.

It is a super-3 number, since 3×556693³ = 517569333396433671, which contains 333 as substring.

Together with 556691, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278346 + 278347.

It is an arithmetic number, because the mean of its divisors is an integer number (278347).

2⁵⁵⁶⁶⁹³ is an apocalyptic number.

It is an amenable number.

556693 is a deficient number, since it is larger than the sum of its proper divisors (1).

556693 is an equidigital number, since it uses as much as digits as its factorization.

556693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 34.

The square root of 556693 is about 746.1186232765. The cubic root of 556693 is about 82.2631344835.

The spelling of 556693 in words is "five hundred fifty-six thousand, six hundred ninety-three".