86808641 has 4 divisors (see below), whose sum is σ = 87249492. Its totient is φ = 86367792.

The previous prime is 86808619. The next prime is 86808653. The reversal of 86808641 is 14680868.

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

It can be written as a sum of positive squares in 2 ways, for example, as 73273600 + 13535041 = 8560^2 + 3679^2 .

It is a cyclic number.

It is not a de Polignac number, because 86808641 - 2¹⁴ = 86792257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86808611) 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, 220130 + ... + 220523.

It is an arithmetic number, because the mean of its divisors is an integer number (21812373).

Almost surely, 2^86808641 is an apocalyptic number.

It is an amenable number.

86808641 is a deficient number, since it is larger than the sum of its proper divisors (440851).

86808641 is a wasteful number, since it uses less digits than its factorization.

86808641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440850.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 86808641 is about 9317.1154871022. The cubic root of 86808641 is about 442.7796498023.

The spelling of 86808641 in words is "eighty-six million, eight hundred eight thousand, six hundred forty-one".