1238066321 has 2 divisors, whose sum is σ = 1238066322. Its totient is φ = 1238066320.

The previous prime is 1238066317. The next prime is 1238066359. The reversal of 1238066321 is 1236608321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 930555025 + 307511296 = 30505^2 + 17536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238066321 - 2² = 1238066317 is a prime.

It is not a weakly prime, because it can be changed into another prime (1238066371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619033160 + 619033161.

It is an arithmetic number, because the mean of its divisors is an integer number (619033161).

Almost surely, 2^1238066321 is an apocalyptic number.

It is an amenable number.

1238066321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238066321 is an equidigital number, since it uses as much as digits as its factorization.

1238066321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1238066321 is about 35186.1666141681. The cubic root of 1238066321 is about 1073.7783334011.

The spelling of 1238066321 in words is "one billion, two hundred thirty-eight million, sixty-six thousand, three hundred twenty-one".