1380305321 has 2 divisors, whose sum is σ = 1380305322. Its totient is φ = 1380305320.

The previous prime is 1380305317. The next prime is 1380305351. The reversal of 1380305321 is 1235030831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1379305321 + 1000000 = 37139^2 + 1000^2 .

It is an emirp because it is prime and its reverse (1235030831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1380305321 - 2² = 1380305317 is a prime.

It is not a weakly prime, because it can be changed into another prime (1380305351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690152660 + 690152661.

It is an arithmetic number, because the mean of its divisors is an integer number (690152661).

Almost surely, 2^1380305321 is an apocalyptic number.

It is an amenable number.

1380305321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380305321 is an equidigital number, since it uses as much as digits as its factorization.

1380305321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1380305321 is about 37152.4604972537. The cubic root of 1380305321 is about 1113.4183829414.

The spelling of 1380305321 in words is "one billion, three hundred eighty million, three hundred five thousand, three hundred twenty-one".