86561441 has 4 divisors (see below), whose sum is σ = 86630400. Its totient is φ = 86492484.

The previous prime is 86561407. The next prime is 86561471. The reversal of 86561441 is 14416568.

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 86561441 - 2²² = 82367137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86561471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32561 + ... + 35118.

It is an arithmetic number, because the mean of its divisors is an integer number (21657600).

Almost surely, 2^86561441 is an apocalyptic number.

It is an amenable number.

86561441 is a deficient number, since it is larger than the sum of its proper divisors (68959).

86561441 is a wasteful number, since it uses less digits than its factorization.

86561441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68958.

The product of its digits is 23040, while the sum is 35.

The square root of 86561441 is about 9303.8401211543. The cubic root of 86561441 is about 442.3589574641.

The spelling of 86561441 in words is "eighty-six million, five hundred sixty-one thousand, four hundred forty-one".