1020688673 has 2 divisors, whose sum is σ = 1020688674. Its totient is φ = 1020688672.

The previous prime is 1020688651. The next prime is 1020688693. The reversal of 1020688673 is 3768860201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 917605264 + 103083409 = 30292^2 + 10153^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020688673 - 2¹⁰ = 1020687649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020688673.

It is not a weakly prime, because it can be changed into another prime (1020688693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510344336 + 510344337.

It is an arithmetic number, because the mean of its divisors is an integer number (510344337).

Almost surely, 2^1020688673 is an apocalyptic number.

It is an amenable number.

1020688673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020688673 is an equidigital number, since it uses as much as digits as its factorization.

1020688673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 1020688673 is about 31948.2186201359. The cubic root of 1020688673 is about 1006.8492056134.

The spelling of 1020688673 in words is "one billion, twenty million, six hundred eighty-eight thousand, six hundred seventy-three".