1276943489 has 2 divisors, whose sum is σ = 1276943490. Its totient is φ = 1276943488.

The previous prime is 1276943477. The next prime is 1276943501. The reversal of 1276943489 is 9843496721.

It is a balanced prime because it is at equal distance from previous prime (1276943477) and next prime (1276943501).

It can be written as a sum of positive squares in only one way, i.e., 1231448464 + 45495025 = 35092^2 + 6745^2 .

It is an emirp because it is prime and its reverse (9843496721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1276943489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1276943489.

It is not a weakly prime, because it can be changed into another prime (1276943189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638471744 + 638471745.

It is an arithmetic number, because the mean of its divisors is an integer number (638471745).

Almost surely, 2^1276943489 is an apocalyptic number.

It is an amenable number.

1276943489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276943489 is an equidigital number, since it uses as much as digits as its factorization.

1276943489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 53.

The square root of 1276943489 is about 35734.3460692931. The cubic root of 1276943489 is about 1084.9021237285.

The spelling of 1276943489 in words is "one billion, two hundred seventy-six million, nine hundred forty-three thousand, four hundred eighty-nine".