1277275313 has 2 divisors, whose sum is σ = 1277275314. Its totient is φ = 1277275312.

The previous prime is 1277275291. The next prime is 1277275343. The reversal of 1277275313 is 3135727721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 709263424 + 568011889 = 26632^2 + 23833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1277275313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1277275343) 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, 638637656 + 638637657.

It is an arithmetic number, because the mean of its divisors is an integer number (638637657).

Almost surely, 2^1277275313 is an apocalyptic number.

It is an amenable number.

1277275313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277275313 is an equidigital number, since it uses as much as digits as its factorization.

1277275313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61740, while the sum is 38.

The square root of 1277275313 is about 35738.9886958207. The cubic root of 1277275313 is about 1084.9960890938.

The spelling of 1277275313 in words is "one billion, two hundred seventy-seven million, two hundred seventy-five thousand, three hundred thirteen".