12172019 has 2 divisors, whose sum is σ = 12172020. Its totient is φ = 12172018.

The previous prime is 12172003. The next prime is 12172049. The reversal of 12172019 is 91027121.

It is a weak prime.

It is an emirp because it is prime and its reverse (91027121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12172019 - 2⁴ = 12172003 is a prime.

It is a super-2 number, since 2×12172019² = 296316093072722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12171985 and 12172003.

It is not a weakly prime, because it can be changed into another prime (12172049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086009 + 6086010.

It is an arithmetic number, because the mean of its divisors is an integer number (6086010).

Almost surely, 2^12172019 is an apocalyptic number.

12172019 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172019 is an equidigital number, since it uses as much as digits as its factorization.

12172019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 12172019 is about 3488.8420715189. The cubic root of 12172019 is about 230.0316213612.

The spelling of 12172019 in words is "twelve million, one hundred seventy-two thousand, nineteen".