1238622149 has 2 divisors, whose sum is σ = 1238622150. Its totient is φ = 1238622148.

The previous prime is 1238622139. The next prime is 1238622157. The reversal of 1238622149 is 9412268321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1143657124 + 94965025 = 33818^2 + 9745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1238622149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238622139) 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, 619311074 + 619311075.

It is an arithmetic number, because the mean of its divisors is an integer number (619311075).

Almost surely, 2^1238622149 is an apocalyptic number.

It is an amenable number.

1238622149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238622149 is an equidigital number, since it uses as much as digits as its factorization.

1238622149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 1238622149 is about 35194.0641159841. The cubic root of 1238622149 is about 1073.9389997454.

The spelling of 1238622149 in words is "one billion, two hundred thirty-eight million, six hundred twenty-two thousand, one hundred forty-nine".