87929 has 4 divisors (see below), whose sum is σ = 91776. Its totient is φ = 84084.

The previous prime is 87917. The next prime is 87931. The reversal of 87929 is 92978.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92978 = 2 ⋅46489.

It is a cyclic number.

It is not a de Polignac number, because 87929 - 2¹² = 83833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (87959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1889 + ... + 1934.

It is an arithmetic number, because the mean of its divisors is an integer number (22944).

2⁸⁷⁹²⁹ is an apocalyptic number.

It is an amenable number.

87929 is a deficient number, since it is larger than the sum of its proper divisors (3847).

87929 is a wasteful number, since it uses less digits than its factorization.

87929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846.

The product of its digits is 9072, while the sum is 35.

The square root of 87929 is about 296.5282448604. The cubic root of 87929 is about 44.4676362757.

The spelling of 87929 in words is "eighty-seven thousand, nine hundred twenty-nine".