12179381 has 2 divisors, whose sum is σ = 12179382. Its totient is φ = 12179380.

The previous prime is 12179359. The next prime is 12179389. The reversal of 12179381 is 18397121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8439025 + 3740356 = 2905^2 + 1934^2 .

It is an emirp because it is prime and its reverse (18397121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12179381 - 2⁶ = 12179317 is a prime.

It is a super-2 number, since 2×12179381² = 296674643086322, which contains 22 as substring.

It is equal to p₇₉₉₀₂₅ and since 12179381 and 799025 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12179389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6089690 + 6089691.

It is an arithmetic number, because the mean of its divisors is an integer number (6089691).

Almost surely, 2^12179381 is an apocalyptic number.

It is an amenable number.

12179381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12179381 is an equidigital number, since it uses as much as digits as its factorization.

12179381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 32.

The square root of 12179381 is about 3489.8969898838. The cubic root of 12179381 is about 230.0779886754.

The spelling of 12179381 in words is "twelve million, one hundred seventy-nine thousand, three hundred eighty-one".