87706905 has 64 divisors (see below), whose sum is σ = 170311680. Its totient is φ = 37958400.

The previous prime is 87706901. The next prime is 87706921. The reversal of 87706905 is 50960778.

It is not a de Polignac number, because 87706905 - 2² = 87706901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87706901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65836 + ... + 67154.

It is an arithmetic number, because the mean of its divisors is an integer number (2661120).

Almost surely, 2^87706905 is an apocalyptic number.

It is an amenable number.

87706905 is a deficient number, since it is larger than the sum of its proper divisors (82604775).

87706905 is a wasteful number, since it uses less digits than its factorization.

87706905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 87706905 is about 9365.1964741803. The cubic root of 87706905 is about 444.3016526123.

The spelling of 87706905 in words is "eighty-seven million, seven hundred six thousand, nine hundred five".