1000643317 has 2 divisors, whose sum is σ = 1000643318. Its totient is φ = 1000643316.

The previous prime is 1000643299. The next prime is 1000643321. The reversal of 1000643317 is 7133460001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 763914321 + 236728996 = 27639^2 + 15386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000643317 - 2²³ = 992254709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000643291 and 1000643300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000643617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500321658 + 500321659.

It is an arithmetic number, because the mean of its divisors is an integer number (500321659).

Almost surely, 2^1000643317 is an apocalyptic number.

It is an amenable number.

1000643317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000643317 is an equidigital number, since it uses as much as digits as its factorization.

1000643317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1000643317 is about 31632.9467011848. The cubic root of 1000643317 is about 1000.2143930323.

The spelling of 1000643317 in words is "one billion, six hundred forty-three thousand, three hundred seventeen".