87564419 has 4 divisors (see below), whose sum is σ = 88619496. Its totient is φ = 86509344.

The previous prime is 87564403. The next prime is 87564439. The reversal of 87564419 is 91446578.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87564419 - 2⁴ = 87564403 is a prime.

It is a super-2 number, since 2×87564419² = 15335054949615122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87564419.

It is not an unprimeable number, because it can be changed into a prime (87564439) 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, 527414 + ... + 527579.

It is an arithmetic number, because the mean of its divisors is an integer number (22154874).

Almost surely, 2^87564419 is an apocalyptic number.

87564419 is a deficient number, since it is larger than the sum of its proper divisors (1055077).

87564419 is a wasteful number, since it uses less digits than its factorization.

87564419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055076.

The product of its digits is 241920, while the sum is 44.

The square root of 87564419 is about 9357.5861737950. The cubic root of 87564419 is about 444.0609225036.

The spelling of 87564419 in words is "eighty-seven million, five hundred sixty-four thousand, four hundred nineteen".