86681109 has 4 divisors (see below), whose sum is σ = 115574816. Its totient is φ = 57787404.

The previous prime is 86681107. The next prime is 86681117. The reversal of 86681109 is 90118668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 86681109 - 2¹ = 86681107 is a prime.

It is a super-2 number, since 2×86681109² = 15027229314939762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86681107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14446849 + ... + 14446854.

It is an arithmetic number, because the mean of its divisors is an integer number (28893704).

Almost surely, 2^86681109 is an apocalyptic number.

It is an amenable number.

86681109 is a deficient number, since it is larger than the sum of its proper divisors (28893707).

86681109 is a wasteful number, since it uses less digits than its factorization.

86681109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28893706.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 86681109 is about 9310.2690079288. The cubic root of 86681109 is about 442.5627119137.

The spelling of 86681109 in words is "eighty-six million, six hundred eighty-one thousand, one hundred nine".