87811201 has 4 divisors (see below), whose sum is σ = 87931732. Its totient is φ = 87690672.

The previous prime is 87811187. The next prime is 87811223. The reversal of 87811201 is 10211878.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86936976 + 874225 = 9324^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 87811201 - 2⁵ = 87811169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87811201.

It is not an unprimeable number, because it can be changed into a prime (87811271) 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 3 ways as a sum of consecutive naturals, for example, 59166 + ... + 60631.

It is an arithmetic number, because the mean of its divisors is an integer number (21982933).

Almost surely, 2^87811201 is an apocalyptic number.

It is an amenable number.

87811201 is a deficient number, since it is larger than the sum of its proper divisors (120531).

87811201 is a wasteful number, since it uses less digits than its factorization.

87811201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120530.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 87811201 is about 9370.7630959277. The cubic root of 87811201 is about 444.4776954961.

The spelling of 87811201 in words is "eighty-seven million, eight hundred eleven thousand, two hundred one".