55844839 has 2 divisors, whose sum is σ = 55844840. Its totient is φ = 55844838.

The previous prime is 55844827. The next prime is 55844843. The reversal of 55844839 is 93844855.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55844839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55844809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27922419 + 27922420.

It is an arithmetic number, because the mean of its divisors is an integer number (27922420).

Almost surely, 2^55844839 is an apocalyptic number.

55844839 is a deficient number, since it is larger than the sum of its proper divisors (1).

55844839 is an equidigital number, since it uses as much as digits as its factorization.

55844839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691200, while the sum is 46.

The square root of 55844839 is about 7472.9404520577. The cubic root of 55844839 is about 382.2325617126.

The spelling of 55844839 in words is "fifty-five million, eight hundred forty-four thousand, eight hundred thirty-nine".