11323681 has 2 divisors, whose sum is σ = 11323682. Its totient is φ = 11323680.

The previous prime is 11323661. The next prime is 11323691. The reversal of 11323681 is 18632311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10240000 + 1083681 = 3200^2 + 1041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11323681 is a prime.

It is a super-2 number, since 2×11323681² = 256451502779522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11323621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5661840 + 5661841.

It is an arithmetic number, because the mean of its divisors is an integer number (5661841).

Almost surely, 2^11323681 is an apocalyptic number.

It is an amenable number.

11323681 is a deficient number, since it is larger than the sum of its proper divisors (1).

11323681 is an equidigital number, since it uses as much as digits as its factorization.

11323681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 11323681 is about 3365.0677556329. The cubic root of 11323681 is about 224.5583501187.

Adding to 11323681 its reverse (18632311), we get a palindrome (29955992).

The spelling of 11323681 in words is "eleven million, three hundred twenty-three thousand, six hundred eighty-one".