1276988477 has 2 divisors, whose sum is σ = 1276988478. Its totient is φ = 1276988476.

The previous prime is 1276988459. The next prime is 1276988509. The reversal of 1276988477 is 7748896721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 893651236 + 383337241 = 29894^2 + 19579^2 .

It is a cyclic number.

It is not a de Polignac number, because 1276988477 - 2¹² = 1276984381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1276988417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638494238 + 638494239.

It is an arithmetic number, because the mean of its divisors is an integer number (638494239).

Almost surely, 2^1276988477 is an apocalyptic number.

It is an amenable number.

1276988477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276988477 is an equidigital number, since it uses as much as digits as its factorization.

1276988477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9483264, while the sum is 59.

The square root of 1276988477 is about 35734.9755421772. The cubic root of 1276988477 is about 1084.9148643089.

The spelling of 1276988477 in words is "one billion, two hundred seventy-six million, nine hundred eighty-eight thousand, four hundred seventy-seven".