87806811 has 16 divisors (see below), whose sum is σ = 118483200. Its totient is φ = 57838560.

The previous prime is 87806767. The next prime is 87806813. The reversal of 87806811 is 11860878.

It is not a de Polignac number, because 87806811 - 2¹³ = 87798619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87806811.

It is not an unprimeable number, because it can be changed into a prime (87806813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146290 + ... + 146888.

It is an arithmetic number, because the mean of its divisors is an integer number (7405200).

Almost surely, 2^87806811 is an apocalyptic number.

87806811 is a deficient number, since it is larger than the sum of its proper divisors (30676389).

87806811 is a wasteful number, since it uses less digits than its factorization.

87806811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106.

The product of its (nonzero) digits is 21504, while the sum is 39.

The square root of 87806811 is about 9370.5288538054. The cubic root of 87806811 is about 444.4702883560.

The spelling of 87806811 in words is "eighty-seven million, eight hundred six thousand, eight hundred eleven".