55438039 has 2 divisors, whose sum is σ = 55438040. Its totient is φ = 55438038.

The previous prime is 55437997. The next prime is 55438057. The reversal of 55438039 is 93083455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55438039 - 2¹⁹ = 54913751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55437989 and 55438007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55448039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27719019 + 27719020.

It is an arithmetic number, because the mean of its divisors is an integer number (27719020).

Almost surely, 2^55438039 is an apocalyptic number.

55438039 is a deficient number, since it is larger than the sum of its proper divisors (1).

55438039 is an equidigital number, since it uses as much as digits as its factorization.

55438039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 55438039 is about 7445.6725015273. The cubic root of 55438039 is about 381.3021785075.

The spelling of 55438039 in words is "fifty-five million, four hundred thirty-eight thousand, thirty-nine".