989187145 has 16 divisors (see below), whose sum is σ = 1213470720. Its totient is φ = 773752384.

The previous prime is 989187137. The next prime is 989187149. The reversal of 989187145 is 541781989.

It is a cyclic number.

It is not a de Polignac number, because 989187145 - 2³ = 989187137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 989187092 and 989187101.

It is not an unprimeable number, because it can be changed into a prime (989187149) 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 15 ways as a sum of consecutive naturals, for example, 427251 + ... + 429559.

It is an arithmetic number, because the mean of its divisors is an integer number (75841920).

Almost surely, 2^989187145 is an apocalyptic number.

It is an amenable number.

989187145 is a deficient number, since it is larger than the sum of its proper divisors (224283575).

989187145 is a wasteful number, since it uses less digits than its factorization.

989187145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4184.

The product of its digits is 725760, while the sum is 52.

The square root of 989187145 is about 31451.3456786828. The cubic root of 989187145 is about 996.3826455246.

The spelling of 989187145 in words is "nine hundred eighty-nine million, one hundred eighty-seven thousand, one hundred forty-five".