11691345 has 16 divisors (see below), whose sum is σ = 18757440. Its totient is φ = 6218304.

The previous prime is 11691343. The next prime is 11691347. The reversal of 11691345 is 54319611.

It is an interprime number because it is at equal distance from previous prime (11691343) and next prime (11691347).

It is not a de Polignac number, because 11691345 - 2¹ = 11691343 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11691341) 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 in 15 ways as a sum of consecutive naturals, for example, 6171 + ... + 7839.

It is an arithmetic number, because the mean of its divisors is an integer number (1172340).

Almost surely, 2^11691345 is an apocalyptic number.

11691345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11691345 is a deficient number, since it is larger than the sum of its proper divisors (7066095).

11691345 is a wasteful number, since it uses less digits than its factorization.

11691345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144.

The product of its digits is 3240, while the sum is 30.

The square root of 11691345 is about 3419.2608850452. The cubic root of 11691345 is about 226.9628756719.

The spelling of 11691345 in words is "eleven million, six hundred ninety-one thousand, three hundred forty-five".