9667428209 has 4 divisors (see below), whose sum is σ = 10176240240. Its totient is φ = 9158616180.

The previous prime is 9667428203. The next prime is 9667428217. The reversal of 9667428209 is 9028247669.

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.

It is a cyclic number.

It is not a de Polignac number, because 9667428209 - 2²⁴ = 9650650993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9667428203) 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, 254405987 + ... + 254406024.

It is an arithmetic number, because the mean of its divisors is an integer number (2544060060).

Almost surely, 2^9667428209 is an apocalyptic number.

It is an amenable number.

9667428209 is a deficient number, since it is larger than the sum of its proper divisors (508812031).

9667428209 is a wasteful number, since it uses less digits than its factorization.

9667428209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508812030.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 9667428209 is about 98323.0807542156. The cubic root of 9667428209 is about 2130.2814478908.

The spelling of 9667428209 in words is "nine billion, six hundred sixty-seven million, four hundred twenty-eight thousand, two hundred nine".