989443625 has 8 divisors (see below), whose sum is σ = 1234825800. Its totient is φ = 791554800.

The previous prime is 989443619. The next prime is 989443633. The reversal of 989443625 is 526344989.

It can be written as a sum of positive squares in 4 ways, for example, as 10316944 + 979126681 = 3212^2 + 31291^2 .

It is not a de Polignac number, because 989443625 - 2¹⁸ = 989181481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3957650 + ... + 3957899.

It is an arithmetic number, because the mean of its divisors is an integer number (154353225).

Almost surely, 2^989443625 is an apocalyptic number.

It is an amenable number.

989443625 is a deficient number, since it is larger than the sum of its proper divisors (245382175).

989443625 is an equidigital number, since it uses as much as digits as its factorization.

989443625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7915564 (or 7915554 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 50.

The square root of 989443625 is about 31455.4228234179. The cubic root of 989443625 is about 996.4687533080.

The spelling of 989443625 in words is "nine hundred eighty-nine million, four hundred forty-three thousand, six hundred twenty-five".