87769 has 8 divisors (see below), whose sum is σ = 97920. Its totient is φ = 78000.

The previous prime is 87767. The next prime is 87793. The reversal of 87769 is 96778.

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

It is a cyclic number.

It is not a de Polignac number, because 87769 - 2¹ = 87767 is a prime.

It is a super-2 number, since 2×87769² = 15406794722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87767) 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, 819 + ... + 919.

It is an arithmetic number, because the mean of its divisors is an integer number (12240).

2⁸⁷⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

87769 is a deficient number, since it is larger than the sum of its proper divisors (10151).

87769 is a wasteful number, since it uses less digits than its factorization.

87769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191.

The product of its digits is 21168, while the sum is 37.

The square root of 87769 is about 296.2583332161. The cubic root of 87769 is about 44.4406480554.

Subtracting 87769 from its reverse (96778), we obtain a palindrome (9009).

It can be divided in two parts, 877 and 69, that added together give a triangular number (946 = T₄₃).

The spelling of 87769 in words is "eighty-seven thousand, seven hundred sixty-nine".