1191313 has 2 divisors, whose sum is σ = 1191314. Its totient is φ = 1191312.

The previous prime is 1191301. The next prime is 1191341. The reversal of 1191313 is 3131911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1183744 + 7569 = 1088^2 + 87^2 .

It is an emirp because it is prime and its reverse (3131911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1191313 - 2¹³ = 1183121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1191353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595656 + 595657.

It is an arithmetic number, because the mean of its divisors is an integer number (595657).

2^1191313 is an apocalyptic number.

It is an amenable number.

1191313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191313 is an equidigital number, since it uses as much as digits as its factorization.

1191313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81, while the sum is 19.

The square root of 1191313 is about 1091.4728581142. The cubic root of 1191313 is about 106.0088102325.

The spelling of 1191313 in words is "one million, one hundred ninety-one thousand, three hundred thirteen".