55558039 has 2 divisors, whose sum is σ = 55558040. Its totient is φ = 55558038.

The previous prime is 55558031. The next prime is 55558079. The reversal of 55558039 is 93085555.

It is an a-pointer prime, because the next prime (55558079) can be obtained adding 55558039 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55558039 - 2³ = 55558031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55557992 and 55558010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55558031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27779019 + 27779020.

It is an arithmetic number, because the mean of its divisors is an integer number (27779020).

Almost surely, 2^55558039 is an apocalyptic number.

55558039 is a deficient number, since it is larger than the sum of its proper divisors (1).

55558039 is an equidigital number, since it uses as much as digits as its factorization.

55558039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 55558039 is about 7453.7265176554. The cubic root of 55558039 is about 381.5770997682.

The spelling of 55558039 in words is "fifty-five million, five hundred fifty-eight thousand, thirty-nine".