11661229 has 2 divisors, whose sum is σ = 11661230. Its totient is φ = 11661228.

The previous prime is 11661197. The next prime is 11661241. The reversal of 11661229 is 92216611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8988004 + 2673225 = 2998^2 + 1635^2 .

It is a cyclic number.

It is not a de Polignac number, because 11661229 - 2⁵ = 11661197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11661197 and 11661206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11661259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5830614 + 5830615.

It is an arithmetic number, because the mean of its divisors is an integer number (5830615).

Almost surely, 2^11661229 is an apocalyptic number.

It is an amenable number.

11661229 is a deficient number, since it is larger than the sum of its proper divisors (1).

11661229 is an equidigital number, since it uses as much as digits as its factorization.

11661229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 11661229 is about 3414.8541696535. The cubic root of 11661229 is about 226.7678284989.

The spelling of 11661229 in words is "eleven million, six hundred sixty-one thousand, two hundred twenty-nine".