55420039 has 2 divisors, whose sum is σ = 55420040. Its totient is φ = 55420038.

The previous prime is 55419929. The next prime is 55420049. The reversal of 55420039 is 93002455.

55420039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55420039 - 2⁷ = 55419911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55419989 and 55420016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55420049) 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, 27710019 + 27710020.

It is an arithmetic number, because the mean of its divisors is an integer number (27710020).

Almost surely, 2^55420039 is an apocalyptic number.

55420039 is a deficient number, since it is larger than the sum of its proper divisors (1).

55420039 is an equidigital number, since it uses as much as digits as its factorization.

55420039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 55420039 is about 7444.4636475706. The cubic root of 55420039 is about 381.2609061110.

The spelling of 55420039 in words is "fifty-five million, four hundred twenty thousand, thirty-nine".