9668889421 has 4 divisors (see below), whose sum is σ = 9703055392. Its totient is φ = 9634723452.

The previous prime is 9668889413. The next prime is 9668889427. The reversal of 9668889421 is 1249888669.

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: 1249888669 = 1877 ⋅665897.

It is a cyclic number.

It is not a de Polignac number, because 9668889421 - 2³ = 9668889413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9668889421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9668889427) 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, 17082561 + ... + 17083126.

It is an arithmetic number, because the mean of its divisors is an integer number (2425763848).

Almost surely, 2^9668889421 is an apocalyptic number.

It is an amenable number.

9668889421 is a deficient number, since it is larger than the sum of its proper divisors (34165971).

9668889421 is a wasteful number, since it uses less digits than its factorization.

9668889421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34165970.

The product of its digits is 11943936, while the sum is 61.

The square root of 9668889421 is about 98330.5111397271. The cubic root of 9668889421 is about 2130.3887717116.

The spelling of 9668889421 in words is "nine billion, six hundred sixty-eight million, eight hundred eighty-nine thousand, four hundred twenty-one".