11691607 has 4 divisors (see below), whose sum is σ = 11851840. Its totient is φ = 11531376.

The previous prime is 11691587. The next prime is 11691643. The reversal of 11691607 is 70619611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11691607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11691677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80007 + ... + 80152.

It is an arithmetic number, because the mean of its divisors is an integer number (2962960).

Almost surely, 2^11691607 is an apocalyptic number.

11691607 is a deficient number, since it is larger than the sum of its proper divisors (160233).

11691607 is an equidigital number, since it uses as much as digits as its factorization.

11691607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160232.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 11691607 is about 3419.2991972040. The cubic root of 11691607 is about 226.9645710522.

The spelling of 11691607 in words is "eleven million, six hundred ninety-one thousand, six hundred seven".