987223189 has 4 divisors (see below), whose sum is σ = 987391360. Its totient is φ = 987055020.

The previous prime is 987223177. The next prime is 987223219. The reversal of 987223189 is 981322789.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 987223189 - 2¹¹ = 987221141 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 (987220189) 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, 74949 + ... + 87130.

It is an arithmetic number, because the mean of its divisors is an integer number (246847840).

Almost surely, 2^987223189 is an apocalyptic number.

It is an amenable number.

987223189 is a deficient number, since it is larger than the sum of its proper divisors (168171).

987223189 is a wasteful number, since it uses less digits than its factorization.

987223189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168170.

The product of its digits is 435456, while the sum is 49.

The square root of 987223189 is about 31420.1080360969. The cubic root of 987223189 is about 995.7227945970.

The spelling of 987223189 in words is "nine hundred eighty-seven million, two hundred twenty-three thousand, one hundred eighty-nine".