1291676263 has 2 divisors, whose sum is σ = 1291676264. Its totient is φ = 1291676262.

The previous prime is 1291676257. The next prime is 1291676291. The reversal of 1291676263 is 3626761921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1291676263 - 2²⁵ = 1258121831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1291676213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645838131 + 645838132.

It is an arithmetic number, because the mean of its divisors is an integer number (645838132).

Almost surely, 2^1291676263 is an apocalyptic number.

1291676263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291676263 is an equidigital number, since it uses as much as digits as its factorization.

1291676263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 1291676263 is about 35939.8979269558. The cubic root of 1291676263 is about 1089.0585431921.

The spelling of 1291676263 in words is "one billion, two hundred ninety-one million, six hundred seventy-six thousand, two hundred sixty-three".