1275388393 has 2 divisors, whose sum is σ = 1275388394. Its totient is φ = 1275388392.

The previous prime is 1275388369. The next prime is 1275388397. The reversal of 1275388393 is 3938835721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1203257344 + 72131049 = 34688^2 + 8493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1275388393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1275388397) 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, 637694196 + 637694197.

It is an arithmetic number, because the mean of its divisors is an integer number (637694197).

Almost surely, 2^1275388393 is an apocalyptic number.

It is an amenable number.

1275388393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275388393 is an equidigital number, since it uses as much as digits as its factorization.

1275388393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The square root of 1275388393 is about 35712.5803184256. The cubic root of 1275388393 is about 1084.4615372010.

The spelling of 1275388393 in words is "one billion, two hundred seventy-five million, three hundred eighty-eight thousand, three hundred ninety-three".