86811111 has 24 divisors (see below), whose sum is σ = 127685376. Its totient is φ = 56826000.

The previous prime is 86811103. The next prime is 86811119. The reversal of 86811111 is 11111868.

It is an interprime number because it is at equal distance from previous prime (86811103) and next prime (86811119).

It is not a de Polignac number, because 86811111 - 2³ = 86811103 is a prime.

86811111 is a modest number, since divided by 11111 gives 868 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86811119) 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, 187266 + ... + 187728.

It is an arithmetic number, because the mean of its divisors is an integer number (5320224).

Almost surely, 2^86811111 is an apocalyptic number.

86811111 is a deficient number, since it is larger than the sum of its proper divisors (40874265).

86811111 is a wasteful number, since it uses less digits than its factorization.

86811111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 800 counting only the distinct ones).

The product of its digits is 384, while the sum is 27.

The square root of 86811111 is about 9317.2480379133. The cubic root of 86811111 is about 442.7838492896.

Adding to 86811111 its reverse (11111868), we get a palindrome (97922979).

The spelling of 86811111 in words is "eighty-six million, eight hundred eleven thousand, one hundred eleven".