1375337321 has 2 divisors, whose sum is σ = 1375337322. Its totient is φ = 1375337320.

The previous prime is 1375337309. The next prime is 1375337339. The reversal of 1375337321 is 1237335731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 849139600 + 526197721 = 29140^2 + 22939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375337321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1375334321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687668660 + 687668661.

It is an arithmetic number, because the mean of its divisors is an integer number (687668661).

Almost surely, 2^1375337321 is an apocalyptic number.

It is an amenable number.

1375337321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375337321 is an equidigital number, since it uses as much as digits as its factorization.

1375337321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39690, while the sum is 35.

The square root of 1375337321 is about 37085.5405919881. The cubic root of 1375337321 is about 1112.0809705997.

The spelling of 1375337321 in words is "one billion, three hundred seventy-five million, three hundred thirty-seven thousand, three hundred twenty-one".