87145223 has 4 divisors (see below), whose sum is σ = 95067528. Its totient is φ = 79222920.

The previous prime is 87145217. The next prime is 87145231. The reversal of 87145223 is 32254178.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87145223 - 2⁶ = 87145159 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 87145223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87145273) 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, 3961136 + ... + 3961157.

It is an arithmetic number, because the mean of its divisors is an integer number (23766882).

Almost surely, 2^87145223 is an apocalyptic number.

87145223 is a deficient number, since it is larger than the sum of its proper divisors (7922305).

87145223 is a wasteful number, since it uses less digits than its factorization.

87145223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7922304.

The product of its digits is 13440, while the sum is 32.

The square root of 87145223 is about 9335.1605770870. The cubic root of 87145223 is about 443.3511730185.

The spelling of 87145223 in words is "eighty-seven million, one hundred forty-five thousand, two hundred twenty-three".