86681767 has 4 divisors (see below), whose sum is σ = 87060520. Its totient is φ = 86303016.

The previous prime is 86681747. The next prime is 86681801. The reversal of 86681767 is 76718668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86681767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86681767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86681717) 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 in 3 ways as a sum of consecutive naturals, for example, 189033 + ... + 189490.

It is an arithmetic number, because the mean of its divisors is an integer number (21765130).

Almost surely, 2^86681767 is an apocalyptic number.

86681767 is a deficient number, since it is larger than the sum of its proper divisors (378753).

86681767 is a wasteful number, since it uses less digits than its factorization.

86681767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378752.

The product of its digits is 677376, while the sum is 49.

The square root of 86681767 is about 9310.3043451866. The cubic root of 86681767 is about 442.5638317484.

The spelling of 86681767 in words is "eighty-six million, six hundred eighty-one thousand, seven hundred sixty-seven".