87216849 has 12 divisors (see below), whose sum is σ = 126462336. Its totient is φ = 57921912.

The previous prime is 87216839. The next prime is 87216863. The reversal of 87216849 is 94861278.

It is not a de Polignac number, because 87216849 - 2¹⁹ = 86692561 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (87216839) 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 11 ways as a sum of consecutive naturals, for example, 16057 + ... + 20790.

It is an arithmetic number, because the mean of its divisors is an integer number (10538528).

Almost surely, 2^87216849 is an apocalyptic number.

It is an amenable number.

87216849 is a deficient number, since it is larger than the sum of its proper divisors (39245487).

87216849 is a wasteful number, since it uses less digits than its factorization.

87216849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37116 (or 37113 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 87216849 is about 9338.9961451968. The cubic root of 87216849 is about 443.4726054730.

The spelling of 87216849 in words is "eighty-seven million, two hundred sixteen thousand, eight hundred forty-nine".