1276113887 has 2 divisors, whose sum is σ = 1276113888. Its totient is φ = 1276113886.

The previous prime is 1276113847. The next prime is 1276113911. The reversal of 1276113887 is 7883116721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1276113887 - 2¹⁸ = 1275851743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1276113827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638056943 + 638056944.

It is an arithmetic number, because the mean of its divisors is an integer number (638056944).

Almost surely, 2^1276113887 is an apocalyptic number.

1276113887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276113887 is an equidigital number, since it uses as much as digits as its factorization.

1276113887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 44.

The square root of 1276113887 is about 35722.7362753751. The cubic root of 1276113887 is about 1084.6671271759.

The spelling of 1276113887 in words is "one billion, two hundred seventy-six million, one hundred thirteen thousand, eight hundred eighty-seven".