1268731159 has 2 divisors, whose sum is σ = 1268731160. Its totient is φ = 1268731158.

The previous prime is 1268731157. The next prime is 1268731187. The reversal of 1268731159 is 9511378621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1268731159 - 2¹ = 1268731157 is a prime.

Together with 1268731157, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1268731151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634365579 + 634365580.

It is an arithmetic number, because the mean of its divisors is an integer number (634365580).

Almost surely, 2^1268731159 is an apocalyptic number.

1268731159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268731159 is an equidigital number, since it uses as much as digits as its factorization.

1268731159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 43.

The square root of 1268731159 is about 35619.2526451637. The cubic root of 1268731159 is about 1082.5713647088.

The spelling of 1268731159 in words is "one billion, two hundred sixty-eight million, seven hundred thirty-one thousand, one hundred fifty-nine".