9629889421 has 2 divisors, whose sum is σ = 9629889422. Its totient is φ = 9629889420.

The previous prime is 9629889413. The next prime is 9629889457. The reversal of 9629889421 is 1249889269.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6726296196 + 2903593225 = 82014^2 + 53885^2 .

It is an emirp because it is prime and its reverse (1249889269) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9629889421 - 2³ = 9629889413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9629869421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4814944710 + 4814944711.

It is an arithmetic number, because the mean of its divisors is an integer number (4814944711).

Almost surely, 2^9629889421 is an apocalyptic number.

It is an amenable number.

9629889421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9629889421 is an equidigital number, since it uses as much as digits as its factorization.

9629889421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 58.

The square root of 9629889421 is about 98131.9999847145. Note that the first 4 decimals coincide. The cubic root of 9629889421 is about 2127.5205649298.

The spelling of 9629889421 in words is "nine billion, six hundred twenty-nine million, eight hundred eighty-nine thousand, four hundred twenty-one".