1002685009 has 2 divisors, whose sum is σ = 1002685010. Its totient is φ = 1002685008.

The previous prime is 1002684953. The next prime is 1002685031. The reversal of 1002685009 is 9005862001.

1002685009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 960070225 + 42614784 = 30985^2 + 6528^2 .

It is an emirp because it is prime and its reverse (9005862001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1002685009 - 2¹⁵ = 1002652241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002685039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501342504 + 501342505.

It is an arithmetic number, because the mean of its divisors is an integer number (501342505).

Almost surely, 2^1002685009 is an apocalyptic number.

It is an amenable number.

1002685009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002685009 is an equidigital number, since it uses as much as digits as its factorization.

1002685009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1002685009 is about 31665.2018626125. The cubic root of 1002685009 is about 1000.8942031624.

The spelling of 1002685009 in words is "one billion, two million, six hundred eighty-five thousand, nine".