12161879 has 2 divisors, whose sum is σ = 12161880. Its totient is φ = 12161878.

The previous prime is 12161869. The next prime is 12161887. The reversal of 12161879 is 97816121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12161879 - 2⁸ = 12161623 is a prime.

It is a super-2 number, since 2×12161879² = 295822601621282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12161839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6080939 + 6080940.

It is an arithmetic number, because the mean of its divisors is an integer number (6080940).

Almost surely, 2^12161879 is an apocalyptic number.

12161879 is a deficient number, since it is larger than the sum of its proper divisors (1).

12161879 is an equidigital number, since it uses as much as digits as its factorization.

12161879 is an evil number, because the sum of its binary digits is even.

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

The square root of 12161879 is about 3487.3885645279. The cubic root of 12161879 is about 229.9677270408.

The spelling of 12161879 in words is "twelve million, one hundred sixty-one thousand, eight hundred seventy-nine".