87905811 has 16 divisors (see below), whose sum is σ = 136224000. Its totient is φ = 49379808.

The previous prime is 87905773. The next prime is 87905813. The reversal of 87905811 is 11850978.

It is not a de Polignac number, because 87905811 - 2⁷ = 87905683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87905811.

It is not an unprimeable number, because it can be changed into a prime (87905813) 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, 34236 + ... + 36713.

It is an arithmetic number, because the mean of its divisors is an integer number (8514000).

Almost surely, 2^87905811 is an apocalyptic number.

87905811 is a deficient number, since it is larger than the sum of its proper divisors (48318189).

87905811 is a wasteful number, since it uses less digits than its factorization.

87905811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71018.

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 87905811 is about 9375.8098850179. The cubic root of 87905811 is about 444.6372686890.

The spelling of 87905811 in words is "eighty-seven million, nine hundred five thousand, eight hundred eleven".