11691679 has 2 divisors, whose sum is σ = 11691680. Its totient is φ = 11691678.

The previous prime is 11691677. The next prime is 11691689. The reversal of 11691679 is 97619611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11691679 - 2¹ = 11691677 is a prime.

Together with 11691677, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11691671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5845839 + 5845840.

It is an arithmetic number, because the mean of its divisors is an integer number (5845840).

Almost surely, 2^11691679 is an apocalyptic number.

11691679 is a deficient number, since it is larger than the sum of its proper divisors (1).

11691679 is an equidigital number, since it uses as much as digits as its factorization.

11691679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 40.

The square root of 11691679 is about 3419.3097256610. The cubic root of 11691679 is about 226.9650369538.

The spelling of 11691679 in words is "eleven million, six hundred ninety-one thousand, six hundred seventy-nine".