968205421 has 2 divisors, whose sum is σ = 968205422. Its totient is φ = 968205420.

The previous prime is 968205419. The next prime is 968205449. The reversal of 968205421 is 124502869.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 967832100 + 373321 = 31110^2 + 611^2 .

It is an emirp because it is prime and its reverse (124502869) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 968205421 - 2¹ = 968205419 is a prime.

Together with 968205419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (968205461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484102710 + 484102711.

It is an arithmetic number, because the mean of its divisors is an integer number (484102711).

Almost surely, 2^968205421 is an apocalyptic number.

It is an amenable number.

968205421 is a deficient number, since it is larger than the sum of its proper divisors (1).

968205421 is an equidigital number, since it uses as much as digits as its factorization.

968205421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 968205421 is about 31115.9994375884. Note that the first 3 decimals coincide. The cubic root of 968205421 is about 989.2874582342.

The spelling of 968205421 in words is "nine hundred sixty-eight million, two hundred five thousand, four hundred twenty-one".