3989817225 has 27 divisors (see below), whose sum is σ = 7147903399. Its totient is φ = 2127397200.

The previous prime is 3989817197. The next prime is 3989817229. The reversal of 3989817225 is 5227189893.

The square root of 3989817225 is 63165.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1436334201 + 2553483024 = 37899^2 + 50532^2 .

It is not a de Polignac number, because 3989817225 - 2⁹ = 3989816713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3989817229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 945370 + ... + 949580.

Almost surely, 2^3989817225 is an apocalyptic number.

3989817225 is the 63165-th square number.

3989817225 is the 31583-rd centered octagonal number.

It is an amenable number.

3989817225 is a deficient number, since it is larger than the sum of its proper divisors (3158086174).

3989817225 is an frugal number, since it uses more digits than its factorization.

3989817225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8438 (or 4219 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The cubic root of 3989817225 is about 1586.0528950097.

The spelling of 3989817225 in words is "three billion, nine hundred eighty-nine million, eight hundred seventeen thousand, two hundred twenty-five".