5555639 has 2 divisors, whose sum is σ = 5555640. Its totient is φ = 5555638.

The previous prime is 5555633. The next prime is 5555653. The reversal of 5555639 is 9365555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5555639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5555633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777819 + 2777820.

It is an arithmetic number, because the mean of its divisors is an integer number (2777820).

Almost surely, 2^5555639 is an apocalyptic number.

5555639 is a deficient number, since it is larger than the sum of its proper divisors (1).

5555639 is an equidigital number, since it uses as much as digits as its factorization.

5555639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 101250, while the sum is 38.

The square root of 5555639 is about 2357.0403051284. The cubic root of 5555639 is about 177.1106482555.

The spelling of 5555639 in words is "five million, five hundred fifty-five thousand, six hundred thirty-nine".