86307561 has 12 divisors (see below), whose sum is σ = 124750080. Its totient is φ = 57499800.

The previous prime is 86307553. The next prime is 86307563. The reversal of 86307561 is 16570368.

It is not a de Polignac number, because 86307561 - 2³ = 86307553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86307563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19120 + ... + 23198.

It is an arithmetic number, because the mean of its divisors is an integer number (10395840).

Almost surely, 2^86307561 is an apocalyptic number.

It is an amenable number.

86307561 is a deficient number, since it is larger than the sum of its proper divisors (38442519).

86307561 is a wasteful number, since it uses less digits than its factorization.

86307561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6436 (or 6433 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 86307561 is about 9290.1862736976. The cubic root of 86307561 is about 441.9260623784.

It can be divided in two parts, 86307 and 561, that added together give a palindrome (86868).

The spelling of 86307561 in words is "eighty-six million, three hundred seven thousand, five hundred sixty-one".