86768681 has 8 divisors (see below), whose sum is σ = 87936840. Its totient is φ = 85604992.

The previous prime is 86768653. The next prime is 86768701. The reversal of 86768681 is 18686768.

It can be written as a sum of positive squares in 4 ways, for example, as 7398400 + 79370281 = 2720^2 + 8909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86768681 - 2²² = 82574377 is a prime.

It is a super-2 number, since 2×86768681² = 15057608004959522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86768641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57371 + ... + 58863.

It is an arithmetic number, because the mean of its divisors is an integer number (10992105).

Almost surely, 2^86768681 is an apocalyptic number.

It is an amenable number.

86768681 is a deficient number, since it is larger than the sum of its proper divisors (1168159).

86768681 is a wasteful number, since it uses less digits than its factorization.

86768681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235.

The product of its digits is 774144, while the sum is 50.

The square root of 86768681 is about 9314.9707997395. The cubic root of 86768681 is about 442.7116988464.

The spelling of 86768681 in words is "eighty-six million, seven hundred sixty-eight thousand, six hundred eighty-one".