1002085789 has 2 divisors, whose sum is σ = 1002085790. Its totient is φ = 1002085788.

The previous prime is 1002085769. The next prime is 1002085801. The reversal of 1002085789 is 9875802001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 799023289 + 203062500 = 28267^2 + 14250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002085789 - 2¹⁷ = 1001954717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002085759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501042894 + 501042895.

It is an arithmetic number, because the mean of its divisors is an integer number (501042895).

Almost surely, 2^1002085789 is an apocalyptic number.

It is an amenable number.

1002085789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002085789 is an equidigital number, since it uses as much as digits as its factorization.

1002085789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 1002085789 is about 31655.7386424642. The cubic root of 1002085789 is about 1000.6947801687.

The spelling of 1002085789 in words is "one billion, two million, eighty-five thousand, seven hundred eighty-nine".