989724145 has 8 divisors (see below), whose sum is σ = 1203938856. Its totient is φ = 780932736.

The previous prime is 989724107. The next prime is 989724181. The reversal of 989724145 is 541427989.

It can be written as a sum of positive squares in 4 ways, for example, as 200732224 + 788991921 = 14168^2 + 28089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989724145 - 2⁹ = 989723633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1355422 + ... + 1356151.

It is an arithmetic number, because the mean of its divisors is an integer number (150492357).

Almost surely, 2^989724145 is an apocalyptic number.

It is an amenable number.

989724145 is a deficient number, since it is larger than the sum of its proper divisors (214214711).

989724145 is a wasteful number, since it uses less digits than its factorization.

989724145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711651.

The product of its digits is 725760, while the sum is 49.

The square root of 989724145 is about 31459.8815159879. The cubic root of 989724145 is about 996.5629149813.

The spelling of 989724145 in words is "nine hundred eighty-nine million, seven hundred twenty-four thousand, one hundred forty-five".