87837861 has 16 divisors (see below), whose sum is σ = 124331328. Its totient is φ = 54969600.

The previous prime is 87837803. The next prime is 87837913. The reversal of 87837861 is 16873878.

It is not a de Polignac number, because 87837861 - 2⁶ = 87837797 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87837861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87837461) 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 15 ways as a sum of consecutive naturals, for example, 19426 + ... + 23516.

It is an arithmetic number, because the mean of its divisors is an integer number (7770708).

Almost surely, 2^87837861 is an apocalyptic number.

It is an amenable number.

87837861 is a deficient number, since it is larger than the sum of its proper divisors (36493467).

87837861 is a wasteful number, since it uses less digits than its factorization.

87837861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532.

The product of its digits is 451584, while the sum is 48.

The square root of 87837861 is about 9372.1854975240. The cubic root of 87837861 is about 444.5226729637.

The spelling of 87837861 in words is "eighty-seven million, eight hundred thirty-seven thousand, eight hundred sixty-one".