87840563 has 8 divisors (see below), whose sum is σ = 88888800. Its totient is φ = 86796288.

The previous prime is 87840541. The next prime is 87840569. The reversal of 87840563 is 36504878.

It is a happy number.

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 87840563 - 2⁶ = 87840499 is a prime.

It is a super-3 number, since 3×87840563³ (a number of 25 digits) contains 333 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 87840563.

It is not an unprimeable number, because it can be changed into a prime (87840569) 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, 78653 + ... + 79761.

It is an arithmetic number, because the mean of its divisors is an integer number (11111100).

Almost surely, 2^87840563 is an apocalyptic number.

87840563 is a deficient number, since it is larger than the sum of its proper divisors (1048237).

87840563 is a wasteful number, since it uses less digits than its factorization.

87840563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 87840563 is about 9372.3296463579. The cubic root of 87840563 is about 444.5272309372.

The spelling of 87840563 in words is "eighty-seven million, eight hundred forty thousand, five hundred sixty-three".