87999223 has 4 divisors (see below), whose sum is σ = 94768408. Its totient is φ = 81230040.

The previous prime is 87999221. The next prime is 87999257. The reversal of 87999223 is 32299978.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32299978 = 2 ⋅16149989.

It is a cyclic number.

It is not a de Polignac number, because 87999223 - 2¹ = 87999221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87999221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3384573 + ... + 3384598.

It is an arithmetic number, because the mean of its divisors is an integer number (23692102).

Almost surely, 2^87999223 is an apocalyptic number.

87999223 is a deficient number, since it is larger than the sum of its proper divisors (6769185).

87999223 is a wasteful number, since it uses less digits than its factorization.

87999223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6769184.

The product of its digits is 489888, while the sum is 49.

The square root of 87999223 is about 9380.7901053163. The cubic root of 87999223 is about 444.7947089945.

The spelling of 87999223 in words is "eighty-seven million, nine hundred ninety-nine thousand, two hundred twenty-three".