87366889 has 4 divisors (see below), whose sum is σ = 87923524. Its totient is φ = 86810256.

The previous prime is 87366863. The next prime is 87366901. The reversal of 87366889 is 98866378.

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 58293225 + 29073664 = 7635^2 + 5392^2 .

It is a cyclic number.

It is not a de Polignac number, because 87366889 - 2¹¹ = 87364841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87366809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278082 + ... + 278395.

It is an arithmetic number, because the mean of its divisors is an integer number (21980881).

Almost surely, 2^87366889 is an apocalyptic number.

It is an amenable number.

87366889 is a deficient number, since it is larger than the sum of its proper divisors (556635).

87366889 is a wasteful number, since it uses less digits than its factorization.

87366889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556634.

The product of its digits is 3483648, while the sum is 55.

The square root of 87366889 is about 9347.0256766524. The cubic root of 87366889 is about 443.7267632083.

It can be divided in two parts, 8736 and 6889, that added together give a 6-th power (15625 = 5⁶).

The spelling of 87366889 in words is "eighty-seven million, three hundred sixty-six thousand, eight hundred eighty-nine".