11657749 has 2 divisors, whose sum is σ = 11657750. Its totient is φ = 11657748.

The previous prime is 11657747. The next prime is 11657753. The reversal of 11657749 is 94775611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11492100 + 165649 = 3390^2 + 407^2 .

It is a cyclic number.

It is not a de Polignac number, because 11657749 - 2¹ = 11657747 is a prime.

It is a super-2 number, since 2×11657749² = 271806223494002, which contains 22 as substring.

Together with 11657747, 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 (11657743) 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 as a sum of consecutive naturals, namely, 5828874 + 5828875.

It is an arithmetic number, because the mean of its divisors is an integer number (5828875).

Almost surely, 2^11657749 is an apocalyptic number.

It is an amenable number.

11657749 is a deficient number, since it is larger than the sum of its proper divisors (1).

11657749 is an equidigital number, since it uses as much as digits as its factorization.

11657749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 40.

The square root of 11657749 is about 3414.3445930369. The cubic root of 11657749 is about 226.7452685395.

The spelling of 11657749 in words is "eleven million, six hundred fifty-seven thousand, seven hundred forty-nine".