1293948221 has 2 divisors, whose sum is σ = 1293948222. Its totient is φ = 1293948220.

The previous prime is 1293948209. The next prime is 1293948223. The reversal of 1293948221 is 1228493921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1284864025 + 9084196 = 35845^2 + 3014^2 .

It is an emirp because it is prime and its reverse (1228493921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1293948221 - 2⁶ = 1293948157 is a prime.

Together with 1293948223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1293948223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646974110 + 646974111.

It is an arithmetic number, because the mean of its divisors is an integer number (646974111).

Almost surely, 2^1293948221 is an apocalyptic number.

It is an amenable number.

1293948221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1293948221 is an equidigital number, since it uses as much as digits as its factorization.

1293948221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 1293948221 is about 35971.4917816873. The cubic root of 1293948221 is about 1089.6966922544.

The spelling of 1293948221 in words is "one billion, two hundred ninety-three million, nine hundred forty-eight thousand, two hundred twenty-one".