86958881 has 2 divisors, whose sum is σ = 86958882. Its totient is φ = 86958880.

The previous prime is 86958871. The next prime is 86958889. The reversal of 86958881 is 18885968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60590656 + 26368225 = 7784^2 + 5135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86958881 is a prime.

It is a super-2 number, since 2×86958881² = 15123693969544322, 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 (86958889) 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, 43479440 + 43479441.

It is an arithmetic number, because the mean of its divisors is an integer number (43479441).

Almost surely, 2^86958881 is an apocalyptic number.

It is an amenable number.

86958881 is a deficient number, since it is larger than the sum of its proper divisors (1).

86958881 is an equidigital number, since it uses as much as digits as its factorization.

86958881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 53.

The square root of 86958881 is about 9325.1745828161. The cubic root of 86958881 is about 443.0349426447.

It can be divided in two parts, 8695 and 8881, that added together give a cube (17576 = 26³).

The spelling of 86958881 in words is "eighty-six million, nine hundred fifty-eight thousand, eight hundred eighty-one".