87804863 has 4 divisors (see below), whose sum is σ = 87888528. Its totient is φ = 87721200.

The previous prime is 87804859. The next prime is 87804889. The reversal of 87804863 is 36840878.

It is a happy number.

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 87804863 - 2² = 87804859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87804853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40238 + ... + 42363.

It is an arithmetic number, because the mean of its divisors is an integer number (21972132).

Almost surely, 2^87804863 is an apocalyptic number.

87804863 is a deficient number, since it is larger than the sum of its proper divisors (83665).

87804863 is a wasteful number, since it uses less digits than its factorization.

87804863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83664.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 87804863 is about 9370.4249103229. The cubic root of 87804863 is about 444.4670014639.

The spelling of 87804863 in words is "eighty-seven million, eight hundred four thousand, eight hundred sixty-three".