86639441 has 4 divisors (see below), whose sum is σ = 99016512. Its totient is φ = 74262372.

The previous prime is 86639369. The next prime is 86639461. The reversal of 86639441 is 14493668.

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 a cyclic number.

It is not a de Polignac number, because 86639441 - 2¹⁴ = 86623057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86639461) 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, 6188525 + ... + 6188538.

It is an arithmetic number, because the mean of its divisors is an integer number (24754128).

Almost surely, 2^86639441 is an apocalyptic number.

It is an amenable number.

86639441 is a deficient number, since it is larger than the sum of its proper divisors (12377071).

86639441 is a wasteful number, since it uses less digits than its factorization.

86639441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12377070.

The product of its digits is 124416, while the sum is 41.

The square root of 86639441 is about 9308.0309947915. The cubic root of 86639441 is about 442.4917865840.

The spelling of 86639441 in words is "eighty-six million, six hundred thirty-nine thousand, four hundred forty-one".