1250650109 has 2 divisors, whose sum is σ = 1250650110. Its totient is φ = 1250650108.

The previous prime is 1250650099. The next prime is 1250650111. The reversal of 1250650109 is 9010560521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 625500100 + 625150009 = 25010^2 + 25003^2 .

It is an emirp because it is prime and its reverse (9010560521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1250650109 is a prime.

Together with 1250650111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1250650189) 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, 625325054 + 625325055.

It is an arithmetic number, because the mean of its divisors is an integer number (625325055).

Almost surely, 2^1250650109 is an apocalyptic number.

It is an amenable number.

1250650109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250650109 is an equidigital number, since it uses as much as digits as its factorization.

1250650109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 1250650109 is about 35364.5317938751. The cubic root of 1250650109 is about 1077.4040616343.

The spelling of 1250650109 in words is "one billion, two hundred fifty million, six hundred fifty thousand, one hundred nine".