556403 has 2 divisors, whose sum is σ = 556404. Its totient is φ = 556402.

The previous prime is 556399. The next prime is 556441. The reversal of 556403 is 304655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556403 - 2² = 556399 is a prime.

It is not a weakly prime, because it can be changed into another prime (556483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278201 + 278202.

It is an arithmetic number, because the mean of its divisors is an integer number (278202).

2⁵⁵⁶⁴⁰³ is an apocalyptic number.

556403 is a deficient number, since it is larger than the sum of its proper divisors (1).

556403 is an equidigital number, since it uses as much as digits as its factorization.

556403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 556403 is about 745.9242588896. The cubic root of 556403 is about 82.2488474631.

It can be divided in two parts, 556 and 403, that added together give a palindrome (959).

The spelling of 556403 in words is "five hundred fifty-six thousand, four hundred three".