8969425921 has 4 divisors (see below), whose sum is σ = 9278716500. Its totient is φ = 8660135344.

The previous prime is 8969425901. The next prime is 8969425937. The reversal of 8969425921 is 1295249698.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1618935696 + 7350490225 = 40236^2 + 85735^2 .

It is a cyclic number.

It is not a de Polignac number, because 8969425921 - 2¹³ = 8969417729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8969425901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154645246 + ... + 154645303.

It is an arithmetic number, because the mean of its divisors is an integer number (2319679125).

Almost surely, 2^8969425921 is an apocalyptic number.

It is an amenable number.

8969425921 is a deficient number, since it is larger than the sum of its proper divisors (309290579).

8969425921 is a wasteful number, since it uses less digits than its factorization.

8969425921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309290578.

The product of its digits is 2799360, while the sum is 55.

The square root of 8969425921 is about 94707.0531745128. The cubic root of 8969425921 is about 2077.7257194038.

The spelling of 8969425921 in words is "eight billion, nine hundred sixty-nine million, four hundred twenty-five thousand, nine hundred twenty-one".