550156993 has 2 divisors, whose sum is σ = 550156994. Its totient is φ = 550156992.

The previous prime is 550156991. The next prime is 550157011. The reversal of 550156993 is 399651055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335329344 + 214827649 = 18312^2 + 14657^2 .

It is a cyclic number.

It is not a de Polignac number, because 550156993 - 2¹ = 550156991 is a prime.

Together with 550156991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (550156991) 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, 275078496 + 275078497.

It is an arithmetic number, because the mean of its divisors is an integer number (275078497).

Almost surely, 2^550156993 is an apocalyptic number.

It is an amenable number.

550156993 is a deficient number, since it is larger than the sum of its proper divisors (1).

550156993 is an equidigital number, since it uses as much as digits as its factorization.

550156993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 182250, while the sum is 43.

The square root of 550156993 is about 23455.4256623068. The cubic root of 550156993 is about 819.3992193689.

The spelling of 550156993 in words is "five hundred fifty million, one hundred fifty-six thousand, nine hundred ninety-three".