1000665073 has 2 divisors, whose sum is σ = 1000665074. Its totient is φ = 1000665072.

The previous prime is 1000665047. The next prime is 1000665079. The reversal of 1000665073 is 3705660001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 917362944 + 83302129 = 30288^2 + 9127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000665073 - 2⁵ = 1000665041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000665079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500332536 + 500332537.

It is an arithmetic number, because the mean of its divisors is an integer number (500332537).

Almost surely, 2^1000665073 is an apocalyptic number.

It is an amenable number.

1000665073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000665073 is an equidigital number, since it uses as much as digits as its factorization.

1000665073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 1000665073 is about 31633.2905812848. The cubic root of 1000665073 is about 1000.2216418713.

The spelling of 1000665073 in words is "one billion, six hundred sixty-five thousand, seventy-three".