86729481 has 16 divisors (see below), whose sum is σ = 134075520. Its totient is φ = 55305360.

The previous prime is 86729477. The next prime is 86729497. The reversal of 86729481 is 18492768.

It is not a de Polignac number, because 86729481 - 2² = 86729477 is a prime.

It is a super-2 number, since 2×86729481² = 15044005749058722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86729431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69210 + ... + 70451.

It is an arithmetic number, because the mean of its divisors is an integer number (8379720).

Almost surely, 2^86729481 is an apocalyptic number.

It is an amenable number.

86729481 is a deficient number, since it is larger than the sum of its proper divisors (47346039).

86729481 is a wasteful number, since it uses less digits than its factorization.

86729481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139693 (or 139687 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 86729481 is about 9312.8664223213. The cubic root of 86729481 is about 442.6450199769.

The spelling of 86729481 in words is "eighty-six million, seven hundred twenty-nine thousand, four hundred eighty-one".