11681237 has 2 divisors, whose sum is σ = 11681238. Its totient is φ = 11681236.

The previous prime is 11681221. The next prime is 11681273. The reversal of 11681237 is 73218611.

Together with next prime (11681273) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8444836 + 3236401 = 2906^2 + 1799^2 .

It is an emirp because it is prime and its reverse (73218611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11681237 - 2⁴ = 11681221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11681437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5840618 + 5840619.

It is an arithmetic number, because the mean of its divisors is an integer number (5840619).

Almost surely, 2^11681237 is an apocalyptic number.

It is an amenable number.

11681237 is a deficient number, since it is larger than the sum of its proper divisors (1).

11681237 is an equidigital number, since it uses as much as digits as its factorization.

11681237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 11681237 is about 3417.7824682095. The cubic root of 11681237 is about 226.8974482919.

Adding to 11681237 its reverse (73218611), we get a palindrome (84899848).

The spelling of 11681237 in words is "eleven million, six hundred eighty-one thousand, two hundred thirty-seven".