9809428569 has 4 divisors (see below), whose sum is σ = 13079238096. Its totient is φ = 6539619044.

The previous prime is 9809428529. The next prime is 9809428571. The reversal of 9809428569 is 9658249089.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9658249089 = 3 ⋅3219416363.

It is a cyclic number.

It is not a de Polignac number, because 9809428569 - 2¹⁷ = 9809297497 is a prime.

It is a super-2 number, since 2×9809428569² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9809428529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1634904759 + ... + 1634904764.

It is an arithmetic number, because the mean of its divisors is an integer number (3269809524).

Almost surely, 2^9809428569 is an apocalyptic number.

It is an amenable number.

9809428569 is a deficient number, since it is larger than the sum of its proper divisors (3269809527).

9809428569 is a wasteful number, since it uses less digits than its factorization.

9809428569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3269809526.

The product of its (nonzero) digits is 11197440, while the sum is 60.

The square root of 9809428569 is about 99042.5593823181. The cubic root of 9809428569 is about 2140.6610303244.

The spelling of 9809428569 in words is "nine billion, eight hundred nine million, four hundred twenty-eight thousand, five hundred sixty-nine".