1000863947 has 2 divisors, whose sum is σ = 1000863948. Its totient is φ = 1000863946.

The previous prime is 1000863943. The next prime is 1000863953. The reversal of 1000863947 is 7493680001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000863947 - 2² = 1000863943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000863947.

It is not a weakly prime, because it can be changed into another prime (1000863943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500431973 + 500431974.

It is an arithmetic number, because the mean of its divisors is an integer number (500431974).

Almost surely, 2^1000863947 is an apocalyptic number.

1000863947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000863947 is an equidigital number, since it uses as much as digits as its factorization.

1000863947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1000863947 is about 31636.4338540234. The cubic root of 1000863947 is about 1000.2878994393.

The spelling of 1000863947 in words is "one billion, eight hundred sixty-three thousand, nine hundred forty-seven".