5556643 has 2 divisors, whose sum is σ = 5556644. Its totient is φ = 5556642.

The previous prime is 5556619. The next prime is 5556653. The reversal of 5556643 is 3466555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5556643 is a prime.

It is a super-3 number, since 3×5556643³ (a number of 21 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5556599 and 5556608.

It is not a weakly prime, because it can be changed into another prime (5556653) 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, 2778321 + 2778322.

It is an arithmetic number, because the mean of its divisors is an integer number (2778322).

Almost surely, 2^5556643 is an apocalyptic number.

5556643 is a deficient number, since it is larger than the sum of its proper divisors (1).

5556643 is an equidigital number, since it uses as much as digits as its factorization.

5556643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 34.

The square root of 5556643 is about 2357.2532744701. The cubic root of 5556643 is about 177.1213165981.

The spelling of 5556643 in words is "five million, five hundred fifty-six thousand, six hundred forty-three".