1291915759 has 2 divisors, whose sum is σ = 1291915760. Its totient is φ = 1291915758.

The previous prime is 1291915741. The next prime is 1291915771. The reversal of 1291915759 is 9575191921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1291915759 - 2⁷ = 1291915631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1291915789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645957879 + 645957880.

It is an arithmetic number, because the mean of its divisors is an integer number (645957880).

Almost surely, 2^1291915759 is an apocalyptic number.

1291915759 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291915759 is an equidigital number, since it uses as much as digits as its factorization.

1291915759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 255150, while the sum is 49.

The square root of 1291915759 is about 35943.2296684647. The cubic root of 1291915759 is about 1089.1258482524.

The spelling of 1291915759 in words is "one billion, two hundred ninety-one million, nine hundred fifteen thousand, seven hundred fifty-nine".