55799 has 2 divisors, whose sum is σ = 55800. Its totient is φ = 55798.

The previous prime is 55793. The next prime is 55807. The reversal of 55799 is 99755.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55799 is a prime.

It is a super-2 number, since 2×55799² = 6227056802, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 10 and base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27899 + 27900.

It is an arithmetic number, because the mean of its divisors is an integer number (27900).

2⁵⁵⁷⁹⁹ is an apocalyptic number.

55799 is a deficient number, since it is larger than the sum of its proper divisors (1).

55799 is an equidigital number, since it uses as much as digits as its factorization.

55799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14175, while the sum is 35.

The square root of 55799 is about 236.2181195421. The cubic root of 55799 is about 38.2127950706.

Subtracting 55799 from its reverse (99755), we obtain a triangular number (43956 = T₂₉₆).

It can be divided in two parts, 557 and 99, that added together give a palindrome (656).

The spelling of 55799 in words is "fifty-five thousand, seven hundred ninety-nine".