55277839 has 2 divisors, whose sum is σ = 55277840. Its totient is φ = 55277838.

The previous prime is 55277791. The next prime is 55277851. The reversal of 55277839 is 93877255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55277839 - 2¹³ = 55269647 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 (55277869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27638919 + 27638920.

It is an arithmetic number, because the mean of its divisors is an integer number (27638920).

Almost surely, 2^55277839 is an apocalyptic number.

55277839 is a deficient number, since it is larger than the sum of its proper divisors (1).

55277839 is an equidigital number, since it uses as much as digits as its factorization.

55277839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 46.

The square root of 55277839 is about 7434.9067916148. The cubic root of 55277839 is about 380.9345395858.

It can be divided in two parts, 5527 and 7839, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 55277839 in words is "fifty-five million, two hundred seventy-seven thousand, eight hundred thirty-nine".