55490173 has 2 divisors, whose sum is σ = 55490174. Its totient is φ = 55490172.

The previous prime is 55490131. The next prime is 55490207. The reversal of 55490173 is 37109455.

It is an a-pointer prime, because the next prime (55490207) can be obtained adding 55490173 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54789604 + 700569 = 7402^2 + 837^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55490173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55490273) 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, 27745086 + 27745087.

It is an arithmetic number, because the mean of its divisors is an integer number (27745087).

Almost surely, 2^55490173 is an apocalyptic number.

It is an amenable number.

55490173 is a deficient number, since it is larger than the sum of its proper divisors (1).

55490173 is an equidigital number, since it uses as much as digits as its factorization.

55490173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 55490173 is about 7449.1726386224. The cubic root of 55490173 is about 381.4216667387.

The spelling of 55490173 in words is "fifty-five million, four hundred ninety thousand, one hundred seventy-three".