86731729 has 8 divisors (see below), whose sum is σ = 99903488. Its totient is φ = 73755360.

The previous prime is 86731717. The next prime is 86731741. The reversal of 86731729 is 92713768.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (86731717) and next prime (86731741).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86731729 - 2¹⁹ = 86207441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86732729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47892 + ... + 49669.

It is an arithmetic number, because the mean of its divisors is an integer number (12487936).

Almost surely, 2^86731729 is an apocalyptic number.

It is an amenable number.

86731729 is a deficient number, since it is larger than the sum of its proper divisors (13171759).

86731729 is a wasteful number, since it uses less digits than its factorization.

86731729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97695.

The product of its digits is 127008, while the sum is 43.

The square root of 86731729 is about 9312.9871147769. The cubic root of 86731729 is about 442.6488443490.

The spelling of 86731729 in words is "eighty-six million, seven hundred thirty-one thousand, seven hundred twenty-nine".