875981 has 2 divisors, whose sum is σ = 875982. Its totient is φ = 875980.

The previous prime is 875969. The next prime is 875983. The reversal of 875981 is 189578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 749956 + 126025 = 866^2 + 355^2 .

It is a cyclic number.

It is not a de Polignac number, because 875981 - 2¹⁰ = 874957 is a prime.

It is a super-2 number, since 2×875981² = 1534685424722, which contains 22 as substring.

Together with 875983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 875981.

It is not a weakly prime, because it can be changed into another prime (875983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437990 + 437991.

It is an arithmetic number, because the mean of its divisors is an integer number (437991).

2⁸⁷⁵⁹⁸¹ is an apocalyptic number.

It is an amenable number.

875981 is a deficient number, since it is larger than the sum of its proper divisors (1).

875981 is an equidigital number, since it uses as much as digits as its factorization.

875981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 38.

The square root of 875981 is about 935.9385663600. The cubic root of 875981 is about 95.6822902742.

The spelling of 875981 in words is "eight hundred seventy-five thousand, nine hundred eighty-one".