1311054491 has 2 divisors, whose sum is σ = 1311054492. Its totient is φ = 1311054490.

The previous prime is 1311054439. The next prime is 1311054527. The reversal of 1311054491 is 1944501131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311054491 - 2¹⁰ = 1311053467 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311054421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655527245 + 655527246.

It is an arithmetic number, because the mean of its divisors is an integer number (655527246).

Almost surely, 2^1311054491 is an apocalyptic number.

1311054491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311054491 is an equidigital number, since it uses as much as digits as its factorization.

1311054491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1311054491 is about 36208.4864500023. The cubic root of 1311054491 is about 1094.4776922852.

The spelling of 1311054491 in words is "one billion, three hundred eleven million, fifty-four thousand, four hundred ninety-one".