8715881 has 2 divisors, whose sum is σ = 8715882. Its totient is φ = 8715880.

The previous prime is 8715877. The next prime is 8715887. The reversal of 8715881 is 1885178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5856400 + 2859481 = 2420^2 + 1691^2 .

It is a cyclic number.

It is not a de Polignac number, because 8715881 - 2² = 8715877 is a prime.

It is a super-2 number, since 2×8715881² = 151933163212322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8715887) 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, 4357940 + 4357941.

It is an arithmetic number, because the mean of its divisors is an integer number (4357941).

Almost surely, 2^8715881 is an apocalyptic number.

It is an amenable number.

8715881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8715881 is an equidigital number, since it uses as much as digits as its factorization.

8715881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 38.

The square root of 8715881 is about 2952.2670949628. The cubic root of 8715881 is about 205.7960796641.

The spelling of 8715881 in words is "eight million, seven hundred fifteen thousand, eight hundred eighty-one".