11691709 has 2 divisors, whose sum is σ = 11691710. Its totient is φ = 11691708.

The previous prime is 11691703. The next prime is 11691731. The reversal of 11691709 is 90719611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11539609 + 152100 = 3397^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 11691709 - 2⁵ = 11691677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11691703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5845854 + 5845855.

It is an arithmetic number, because the mean of its divisors is an integer number (5845855).

Almost surely, 2^11691709 is an apocalyptic number.

It is an amenable number.

11691709 is a deficient number, since it is larger than the sum of its proper divisors (1).

11691709 is an equidigital number, since it uses as much as digits as its factorization.

11691709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 11691709 is about 3419.3141125085. The cubic root of 11691709 is about 226.9652310789.

The spelling of 11691709 in words is "eleven million, six hundred ninety-one thousand, seven hundred nine".