1291289107 has 2 divisors, whose sum is σ = 1291289108. Its totient is φ = 1291289106.

The previous prime is 1291289089. The next prime is 1291289113. The reversal of 1291289107 is 7019821921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1291289107 - 2¹¹ = 1291287059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1291289107.

It is not a weakly prime, because it can be changed into another prime (1291289147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645644553 + 645644554.

It is an arithmetic number, because the mean of its divisors is an integer number (645644554).

Almost surely, 2^1291289107 is an apocalyptic number.

1291289107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291289107 is an equidigital number, since it uses as much as digits as its factorization.

1291289107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1291289107 is about 35934.5113644251. The cubic root of 1291289107 is about 1088.9497239536.

The spelling of 1291289107 in words is "one billion, two hundred ninety-one million, two hundred eighty-nine thousand, one hundred seven".