55986449 has 2 divisors, whose sum is σ = 55986450. Its totient is φ = 55986448.

The previous prime is 55986419. The next prime is 55986451. The reversal of 55986449 is 94468955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35916049 + 20070400 = 5993^2 + 4480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55986449 is a prime.

Together with 55986451, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55986397 and 55986406.

It is not a weakly prime, because it can be changed into another prime (55986419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27993224 + 27993225.

It is an arithmetic number, because the mean of its divisors is an integer number (27993225).

Almost surely, 2^55986449 is an apocalyptic number.

It is an amenable number.

55986449 is a deficient number, since it is larger than the sum of its proper divisors (1).

55986449 is an equidigital number, since it uses as much as digits as its factorization.

55986449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 50.

The square root of 55986449 is about 7482.4093044954. The cubic root of 55986449 is about 382.5553743859. Note that the first 3 decimals are identical.

The spelling of 55986449 in words is "fifty-five million, nine hundred eighty-six thousand, four hundred forty-nine".