86929729 has 4 divisors (see below), whose sum is σ = 87513300. Its totient is φ = 86346160.

The previous prime is 86929723. The next prime is 86929741. The reversal of 86929729 is 92792968.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4210704 + 82719025 = 2052^2 + 9095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86929729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86929723) 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, 291562 + ... + 291859.

It is an arithmetic number, because the mean of its divisors is an integer number (21878325).

Almost surely, 2^86929729 is an apocalyptic number.

It is an amenable number.

86929729 is a deficient number, since it is larger than the sum of its proper divisors (583571).

86929729 is a wasteful number, since it uses less digits than its factorization.

86929729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583570.

The product of its digits is 979776, while the sum is 52.

The square root of 86929729 is about 9323.6113711373. The cubic root of 86929729 is about 442.9854295952.

The spelling of 86929729 in words is "eighty-six million, nine hundred twenty-nine thousand, seven hundred twenty-nine".