12005879 has 2 divisors, whose sum is σ = 12005880. Its totient is φ = 12005878.

The previous prime is 12005857. The next prime is 12005881. The reversal of 12005879 is 97850021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12005879 - 2¹⁶ = 11940343 is a prime.

It is a super-2 number, since 2×12005879² = 288282261125282, which contains 22 as substring.

Together with 12005881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12005479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6002939 + 6002940.

It is an arithmetic number, because the mean of its divisors is an integer number (6002940).

Almost surely, 2^12005879 is an apocalyptic number.

12005879 is a deficient number, since it is larger than the sum of its proper divisors (1).

12005879 is an equidigital number, since it uses as much as digits as its factorization.

12005879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 12005879 is about 3464.9500717904. The cubic root of 12005879 is about 228.9802300458.

The spelling of 12005879 in words is "twelve million, five thousand, eight hundred seventy-nine".