1243188119 has 2 divisors, whose sum is σ = 1243188120. Its totient is φ = 1243188118.

The previous prime is 1243188097. The next prime is 1243188139. The reversal of 1243188119 is 9118813421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243188119 is a prime.

It is a super-2 number, since 2×1243188119² = 3091033398445516322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243188139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621594059 + 621594060.

It is an arithmetic number, because the mean of its divisors is an integer number (621594060).

Almost surely, 2^1243188119 is an apocalyptic number.

1243188119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243188119 is an equidigital number, since it uses as much as digits as its factorization.

1243188119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 38.

The square root of 1243188119 is about 35258.8729116516. The cubic root of 1243188119 is about 1075.2570127143.

The spelling of 1243188119 in words is "one billion, two hundred forty-three million, one hundred eighty-eight thousand, one hundred nineteen".