87469 has 4 divisors (see below), whose sum is σ = 91296. Its totient is φ = 83644.

The previous prime is 87443. The next prime is 87473. The reversal of 87469 is 96478.

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: 96478 = 2 ⋅48239.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87469 is a prime.

It is a super-2 number, since 2×87469² = 15301651922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

87469 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87869) 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, 1879 + ... + 1924.

It is an arithmetic number, because the mean of its divisors is an integer number (22824).

2⁸⁷⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

87469 is a deficient number, since it is larger than the sum of its proper divisors (3827).

87469 is a wasteful number, since it uses less digits than its factorization.

87469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826.

The product of its digits is 12096, while the sum is 34.

The square root of 87469 is about 295.7515849493. The cubic root of 87469 is about 44.3899566061.

Subtracting 87469 from its reverse (96478), we obtain a palindrome (9009).

It can be divided in two parts, 874 and 69, that multiplied together give a palindrome (60306).

The spelling of 87469 in words is "eighty-seven thousand, four hundred sixty-nine".