55444439 has 2 divisors, whose sum is σ = 55444440. Its totient is φ = 55444438.

The previous prime is 55444427. The next prime is 55444457. The reversal of 55444439 is 93444455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55444439 - 2⁸ = 55444183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55444469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27722219 + 27722220.

It is an arithmetic number, because the mean of its divisors is an integer number (27722220).

Almost surely, 2^55444439 is an apocalyptic number.

55444439 is a deficient number, since it is larger than the sum of its proper divisors (1).

55444439 is an equidigital number, since it uses as much as digits as its factorization.

55444439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 38.

The square root of 55444439 is about 7446.1022689727. The cubic root of 55444439 is about 381.3168509844.

The spelling of 55444439 in words is "fifty-five million, four hundred forty-four thousand, four hundred thirty-nine".