900968009 has 2 divisors, whose sum is σ = 900968010. Its totient is φ = 900968008.

The previous prime is 900967999. The next prime is 900968017. The reversal of 900968009 is 900869009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 822255625 + 78712384 = 28675^2 + 8872^2 .

It is an emirp because it is prime and its reverse (900869009) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900968009 is a prime.

It is not a weakly prime, because it can be changed into another prime (900968059) 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, 450484004 + 450484005.

It is an arithmetic number, because the mean of its divisors is an integer number (450484005).

Almost surely, 2^900968009 is an apocalyptic number.

It is an amenable number.

900968009 is a deficient number, since it is larger than the sum of its proper divisors (1).

900968009 is an equidigital number, since it uses as much as digits as its factorization.

900968009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 900968009 is about 30016.1291475100. The cubic root of 900968009 is about 965.8354096198.

The spelling of 900968009 in words is "nine hundred million, nine hundred sixty-eight thousand, nine".