550646387 has 2 divisors, whose sum is σ = 550646388. Its totient is φ = 550646386.

The previous prime is 550646279. The next prime is 550646413. The reversal of 550646387 is 783646055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 550646387 - 2²² = 546452083 is a prime.

It is a super-2 number, since 2×550646387² = 606422887032307538, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (550645387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275323193 + 275323194.

It is an arithmetic number, because the mean of its divisors is an integer number (275323194).

Almost surely, 2^550646387 is an apocalyptic number.

550646387 is a deficient number, since it is larger than the sum of its proper divisors (1).

550646387 is an equidigital number, since it uses as much as digits as its factorization.

550646387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 44.

The square root of 550646387 is about 23465.8557696070. The cubic root of 550646387 is about 819.6421138027.

The spelling of 550646387 in words is "five hundred fifty million, six hundred forty-six thousand, three hundred eighty-seven".