1020684589 has 2 divisors, whose sum is σ = 1020684590. Its totient is φ = 1020684588.

The previous prime is 1020684563. The next prime is 1020684629. The reversal of 1020684589 is 9854860201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 603095364 + 417589225 = 24558^2 + 20435^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020684589 - 2⁵ = 1020684557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020684529) 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, 510342294 + 510342295.

It is an arithmetic number, because the mean of its divisors is an integer number (510342295).

Almost surely, 2^1020684589 is an apocalyptic number.

It is an amenable number.

1020684589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020684589 is an equidigital number, since it uses as much as digits as its factorization.

1020684589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 1020684589 is about 31948.1547041453. The cubic root of 1020684589 is about 1006.8478627365.

The spelling of 1020684589 in words is "one billion, twenty million, six hundred eighty-four thousand, five hundred eighty-nine".