87019 has 4 divisors (see below), whose sum is σ = 87696. Its totient is φ = 86344.

The previous prime is 87013. The next prime is 87037. The reversal of 87019 is 91078.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 87019 - 2³ = 87011 is a prime.

It is a super-2 number, since 2×87019² = 15144612722, which contains 22 as substring.

It is a Duffinian number.

87019 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 86984 and 87002.

It is not an unprimeable number, because it can be changed into a prime (87011) 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, 79 + ... + 424.

It is an arithmetic number, because the mean of its divisors is an integer number (21924).

2⁸⁷⁰¹⁹ is an apocalyptic number.

87019 is a deficient number, since it is larger than the sum of its proper divisors (677).

87019 is a wasteful number, since it uses less digits than its factorization.

87019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 87019 is about 294.9898303332. The cubic root of 87019 is about 44.3137016490.

The spelling of 87019 in words is "eighty-seven thousand, nineteen".