1313112091 has 2 divisors, whose sum is σ = 1313112092. Its totient is φ = 1313112090.

The previous prime is 1313112089. The next prime is 1313112109. The reversal of 1313112091 is 1902113131.

Together with next prime (1313112109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1313112091 - 2¹ = 1313112089 is a prime.

Together with 1313112089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1313112071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656556045 + 656556046.

It is an arithmetic number, because the mean of its divisors is an integer number (656556046).

Almost surely, 2^1313112091 is an apocalyptic number.

1313112091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313112091 is an equidigital number, since it uses as much as digits as its factorization.

1313112091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1313112091 is about 36236.8885391668. Note that the first 3 decimals coincide. The cubic root of 1313112091 is about 1095.0499594256.

The spelling of 1313112091 in words is "one billion, three hundred thirteen million, one hundred twelve thousand, ninety-one".