86836681 has 2 divisors, whose sum is σ = 86836682. Its totient is φ = 86836680.

The previous prime is 86836679. The next prime is 86836691. The reversal of 86836681 is 18663868.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74649600 + 12187081 = 8640^2 + 3491^2 .

It is a cyclic number.

It is not a de Polignac number, because 86836681 - 2¹ = 86836679 is a prime.

It is a super-2 number, since 2×86836681² = 15081218334191522, which contains 22 as substring.

Together with 86836679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (86836691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43418340 + 43418341.

It is an arithmetic number, because the mean of its divisors is an integer number (43418341).

Almost surely, 2^86836681 is an apocalyptic number.

It is an amenable number.

86836681 is a deficient number, since it is larger than the sum of its proper divisors (1).

86836681 is an equidigital number, since it uses as much as digits as its factorization.

86836681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 46.

The square root of 86836681 is about 9318.6201231727. The cubic root of 86836681 is about 442.8273186545.

The spelling of 86836681 in words is "eighty-six million, eight hundred thirty-six thousand, six hundred eighty-one".