87705851 has 16 divisors (see below), whose sum is σ = 92897280. Its totient is φ = 82695360.

The previous prime is 87705833. The next prime is 87705859. The reversal of 87705851 is 15850778.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87705851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87705799 and 87705808.

It is not an unprimeable number, because it can be changed into a prime (87705859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228806 + ... + 229188.

It is an arithmetic number, because the mean of its divisors is an integer number (5806080).

Almost surely, 2^87705851 is an apocalyptic number.

87705851 is a deficient number, since it is larger than the sum of its proper divisors (5191429).

87705851 is a wasteful number, since it uses less digits than its factorization.

87705851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586.

The product of its (nonzero) digits is 78400, while the sum is 41.

The square root of 87705851 is about 9365.1402018336. The cubic root of 87705851 is about 444.2998728368.

The spelling of 87705851 in words is "eighty-seven million, seven hundred five thousand, eight hundred fifty-one".