87729 has 4 divisors (see below), whose sum is σ = 116976. Its totient is φ = 58484.

The previous prime is 87721. The next prime is 87739. The reversal of 87729 is 92778.

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 87729 - 2³ = 87721 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 87729.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 87729.

It is not an unprimeable number, because it can be changed into a prime (87721) 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, 14619 + ... + 14624.

It is an arithmetic number, because the mean of its divisors is an integer number (29244).

2⁸⁷⁷²⁹ is an apocalyptic number.

It is an amenable number.

87729 is a deficient number, since it is larger than the sum of its proper divisors (29247).

87729 is a wasteful number, since it uses less digits than its factorization.

87729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29246.

The product of its digits is 7056, while the sum is 33.

The square root of 87729 is about 296.1908168732. The cubic root of 87729 is about 44.4338958762.

The spelling of 87729 in words is "eighty-seven thousand, seven hundred twenty-nine".