1000863943 has 2 divisors, whose sum is σ = 1000863944. Its totient is φ = 1000863942.

The previous prime is 1000863907. The next prime is 1000863947. The reversal of 1000863943 is 3493680001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1000863943 - 2¹⁷ = 1000732871 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000863899 and 1000863908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000863947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500431971 + 500431972.

It is an arithmetic number, because the mean of its divisors is an integer number (500431972).

Almost surely, 2^1000863943 is an apocalyptic number.

1000863943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000863943 is an equidigital number, since it uses as much as digits as its factorization.

1000863943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1000863943 is about 31636.4337908052. The cubic root of 1000863943 is about 1000.2878981067.

The spelling of 1000863943 in words is "one billion, eight hundred sixty-three thousand, nine hundred forty-three".