7872863 has 2 divisors, whose sum is σ = 7872864. Its totient is φ = 7872862.

The previous prime is 7872817. The next prime is 7872869. The reversal of 7872863 is 3682787.

It is a strong prime.

It is an emirp because it is prime and its reverse (3682787) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7872863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7872863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7872869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3936431 + 3936432.

It is an arithmetic number, because the mean of its divisors is an integer number (3936432).

Almost surely, 2^7872863 is an apocalyptic number.

7872863 is a deficient number, since it is larger than the sum of its proper divisors (1).

7872863 is an equidigital number, since it uses as much as digits as its factorization.

7872863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 41.

The square root of 7872863 is about 2805.8622560632. The cubic root of 7872863 is about 198.9348624805.

The spelling of 7872863 in words is "seven million, eight hundred seventy-two thousand, eight hundred sixty-three".