11297681 has 2 divisors, whose sum is σ = 11297682. Its totient is φ = 11297680.

The previous prime is 11297677. The next prime is 11297683. The reversal of 11297681 is 18679211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10297681 + 1000000 = 3209^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 11297681 - 2² = 11297677 is a prime.

It is a super-2 number, since 2×11297681² = 255275191955522, which contains 22 as substring.

Together with 11297683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11297683) 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, 5648840 + 5648841.

It is an arithmetic number, because the mean of its divisors is an integer number (5648841).

Almost surely, 2^11297681 is an apocalyptic number.

It is an amenable number.

11297681 is a deficient number, since it is larger than the sum of its proper divisors (1).

11297681 is an equidigital number, since it uses as much as digits as its factorization.

11297681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 35.

The square root of 11297681 is about 3361.2023146487. The cubic root of 11297681 is about 224.3863509438.

The spelling of 11297681 in words is "eleven million, two hundred ninety-seven thousand, six hundred eighty-one".