1229188087 has 2 divisors, whose sum is σ = 1229188088. Its totient is φ = 1229188086.

The previous prime is 1229188049. The next prime is 1229188117. The reversal of 1229188087 is 7808819221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1229188087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1229188027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614594043 + 614594044.

It is an arithmetic number, because the mean of its divisors is an integer number (614594044).

Almost surely, 2^1229188087 is an apocalyptic number.

1229188087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229188087 is an equidigital number, since it uses as much as digits as its factorization.

1229188087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 46.

The square root of 1229188087 is about 35059.7787642763. The cubic root of 1229188087 is about 1071.2054679091.

The spelling of 1229188087 in words is "one billion, two hundred twenty-nine million, one hundred eighty-eight thousand, eighty-seven".