11661323 has 2 divisors, whose sum is σ = 11661324. Its totient is φ = 11661322.

The previous prime is 11661319. The next prime is 11661347. The reversal of 11661323 is 32316611.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (32316611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11661323 - 2² = 11661319 is a prime.

It is a super-2 number, since 2×11661323² = 271972908220658, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11661523) 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, 5830661 + 5830662.

It is an arithmetic number, because the mean of its divisors is an integer number (5830662).

Almost surely, 2^11661323 is an apocalyptic number.

11661323 is a deficient number, since it is larger than the sum of its proper divisors (1).

11661323 is an equidigital number, since it uses as much as digits as its factorization.

11661323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 11661323 is about 3414.8679330246. The cubic root of 11661323 is about 226.7684378149.

Adding to 11661323 its reverse (32316611), we get a palindrome (43977934).

The spelling of 11661323 in words is "eleven million, six hundred sixty-one thousand, three hundred twenty-three".