550009997 has 2 divisors, whose sum is σ = 550009998. Its totient is φ = 550009996.

The previous prime is 550009981. The next prime is 550010057. The reversal of 550009997 is 799900055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 459930916 + 90079081 = 21446^2 + 9491^2 .

It is a cyclic number.

It is not a de Polignac number, because 550009997 - 2⁴ = 550009981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550009907) 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, 275004998 + 275004999.

It is an arithmetic number, because the mean of its divisors is an integer number (275004999).

Almost surely, 2^550009997 is an apocalyptic number.

It is an amenable number.

550009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

550009997 is an equidigital number, since it uses as much as digits as its factorization.

550009997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127575, while the sum is 44.

The square root of 550009997 is about 23452.2919349048. The cubic root of 550009997 is about 819.3262346644.

The spelling of 550009997 in words is "five hundred fifty million, nine thousand, nine hundred ninety-seven".