968421917 has 2 divisors, whose sum is σ = 968421918. Its totient is φ = 968421916.

The previous prime is 968421913. The next prime is 968421943. The reversal of 968421917 is 719124869.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 966836836 + 1585081 = 31094^2 + 1259^2 .

It is a cyclic number.

It is not a de Polignac number, because 968421917 - 2² = 968421913 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (968421913) 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, 484210958 + 484210959.

It is an arithmetic number, because the mean of its divisors is an integer number (484210959).

Almost surely, 2^968421917 is an apocalyptic number.

It is an amenable number.

968421917 is a deficient number, since it is larger than the sum of its proper divisors (1).

968421917 is an equidigital number, since it uses as much as digits as its factorization.

968421917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 47.

The square root of 968421917 is about 31119.4780965234. The cubic root of 968421917 is about 989.3611894250.

The spelling of 968421917 in words is "nine hundred sixty-eight million, four hundred twenty-one thousand, nine hundred seventeen".