8921747025 has 45 divisors (see below), whose sum is σ = 16534036651. Its totient is φ = 4755998160.

The previous prime is 8921747011. The next prime is 8921747047. The reversal of 8921747025 is 5207471298.

It is a happy number.

The square root of 8921747025 is 94455.

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., 3211828929 + 5709918096 = 56673^2 + 75564^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 8921747025 - 2⁵ = 8921746993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 4249426 + ... + 4251524.

Almost surely, 2^8921747025 is an apocalyptic number.

8921747025 is the 94455-th square number.

8921747025 is the 47228-th centered octagonal number.

It is an amenable number.

8921747025 is a deficient number, since it is larger than the sum of its proper divisors (7612289626).

8921747025 is an frugal number, since it uses more digits than its factorization.

8921747025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4220 (or 2107 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The cubic root of 8921747025 is about 2074.0376453867.

The spelling of 8921747025 in words is "eight billion, nine hundred twenty-one million, seven hundred forty-seven thousand, twenty-five".