1224188939 has 2 divisors, whose sum is σ = 1224188940. Its totient is φ = 1224188938.

The previous prime is 1224188909. The next prime is 1224188957. The reversal of 1224188939 is 9398814221.

It is a strong prime.

It is an emirp because it is prime and its reverse (9398814221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224188939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1224188893 and 1224188902.

It is not a weakly prime, because it can be changed into another prime (1224188909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612094469 + 612094470.

It is an arithmetic number, because the mean of its divisors is an integer number (612094470).

Almost surely, 2^1224188939 is an apocalyptic number.

1224188939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224188939 is an equidigital number, since it uses as much as digits as its factorization.

1224188939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 47.

The square root of 1224188939 is about 34988.4114958082. The cubic root of 1224188939 is about 1069.7512855412.

The spelling of 1224188939 in words is "one billion, two hundred twenty-four million, one hundred eighty-eight thousand, nine hundred thirty-nine".