86811867 has 24 divisors (see below), whose sum is σ = 133645824. Its totient is φ = 54174384.

The previous prime is 86811853. The next prime is 86811871. The reversal of 86811867 is 76811868.

It is not a de Polignac number, because 86811867 - 2⁸ = 86811611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86811847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5268 + ... + 14190.

It is an arithmetic number, because the mean of its divisors is an integer number (5568576).

Almost surely, 2^86811867 is an apocalyptic number.

86811867 is a deficient number, since it is larger than the sum of its proper divisors (46833957).

86811867 is a wasteful number, since it uses less digits than its factorization.

86811867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8999 (or 8996 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 86811867 is about 9317.2886077442. The cubic root of 86811867 is about 442.7851346229.

Subtracting from 86811867 its reverse (76811868), we obtain a palindrome (9999999).

It can be divided in two parts, 86811 and 867, that added together give a palindrome (87678).

The spelling of 86811867 in words is "eighty-six million, eight hundred eleven thousand, eight hundred sixty-seven".