87854243 has 4 divisors (see below), whose sum is σ = 90228720. Its totient is φ = 85479768.

The previous prime is 87854177. The next prime is 87854251. The reversal of 87854243 is 34245878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34245878 = 2 ⋅17122939.

It is not a de Polignac number, because 87854243 - 2¹⁰ = 87853219 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 87854243.

It is not an unprimeable number, because it can be changed into a prime (87851243) 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, 1187183 + ... + 1187256.

It is an arithmetic number, because the mean of its divisors is an integer number (22557180).

Almost surely, 2^87854243 is an apocalyptic number.

87854243 is a deficient number, since it is larger than the sum of its proper divisors (2374477).

87854243 is a wasteful number, since it uses less digits than its factorization.

87854243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374476.

The product of its digits is 215040, while the sum is 41.

The square root of 87854243 is about 9373.0594258225. The cubic root of 87854243 is about 444.5503061417.

The spelling of 87854243 in words is "eighty-seven million, eight hundred fifty-four thousand, two hundred forty-three".