55498109 has 2 divisors, whose sum is σ = 55498110. Its totient is φ = 55498108.

The previous prime is 55498099. The next prime is 55498123. The reversal of 55498109 is 90189455.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49632025 + 5866084 = 7045^2 + 2422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55498109 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55498129) 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, 27749054 + 27749055.

It is an arithmetic number, because the mean of its divisors is an integer number (27749055).

Almost surely, 2^55498109 is an apocalyptic number.

It is an amenable number.

55498109 is a deficient number, since it is larger than the sum of its proper divisors (1).

55498109 is an equidigital number, since it uses as much as digits as its factorization.

55498109 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 41.

The square root of 55498109 is about 7449.7052961845. The cubic root of 55498109 is about 381.4398490456.

It can be divided in two parts, 5549 and 8109, that multiplied together give a triangular number (44996841 = T₉₄₈₆).

The spelling of 55498109 in words is "fifty-five million, four hundred ninety-eight thousand, one hundred nine".