989550145 has 4 divisors (see below), whose sum is σ = 1187460180. Its totient is φ = 791640112.

The previous prime is 989550143. The next prime is 989550169. The reversal of 989550145 is 541055989.

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 533471409 + 456078736 = 23097^2 + 21356^2 .

It is a cyclic number.

It is not a de Polignac number, because 989550145 - 2¹ = 989550143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 989550095 and 989550104.

It is not an unprimeable number, because it can be changed into a prime (989550143) 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, 98955010 + ... + 98955019.

It is an arithmetic number, because the mean of its divisors is an integer number (296865045).

Almost surely, 2^989550145 is an apocalyptic number.

It is an amenable number.

989550145 is a deficient number, since it is larger than the sum of its proper divisors (197910035).

989550145 is a wasteful number, since it uses less digits than its factorization.

989550145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197910034.

The product of its (nonzero) digits is 324000, while the sum is 46.

The square root of 989550145 is about 31457.1159676153. The cubic root of 989550145 is about 996.5045107917.

The spelling of 989550145 in words is "nine hundred eighty-nine million, five hundred fifty thousand, one hundred forty-five".