875678721 has 16 divisors (see below), whose sum is σ = 1236912768. Its totient is φ = 549152000.

The previous prime is 875678719. The next prime is 875678723. The reversal of 875678721 is 127876578.

It is an interprime number because it is at equal distance from previous prime (875678719) and next prime (875678723).

It is a cyclic number.

It is not a de Polignac number, because 875678721 - 2¹ = 875678719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (875678723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130396 + ... + 136946.

It is an arithmetic number, because the mean of its divisors is an integer number (77307048).

Almost surely, 2^875678721 is an apocalyptic number.

It is an amenable number.

875678721 is a deficient number, since it is larger than the sum of its proper divisors (361234047).

875678721 is a wasteful number, since it uses less digits than its factorization.

875678721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9192.

The product of its digits is 1317120, while the sum is 51.

The square root of 875678721 is about 29591.8691704326. The cubic root of 875678721 is about 956.7128315784.

The spelling of 875678721 in words is "eight hundred seventy-five million, six hundred seventy-eight thousand, seven hundred twenty-one".