4251908149 has 2 divisors, whose sum is σ = 4251908150. Its totient is φ = 4251908148.

The previous prime is 4251908119. The next prime is 4251908153. The reversal of 4251908149 is 9418091524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3507600625 + 744307524 = 59225^2 + 27282^2 .

It is a cyclic number.

It is not a de Polignac number, because 4251908149 - 2⁹ = 4251907637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4251908119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2125954074 + 2125954075.

It is an arithmetic number, because the mean of its divisors is an integer number (2125954075).

Almost surely, 2^4251908149 is an apocalyptic number.

It is an amenable number.

4251908149 is a deficient number, since it is larger than the sum of its proper divisors (1).

4251908149 is an equidigital number, since it uses as much as digits as its factorization.

4251908149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 4251908149 is about 65206.6572444869. The cubic root of 4251908149 is about 1620.0482824862.

The spelling of 4251908149 in words is "four billion, two hundred fifty-one million, nine hundred eight thousand, one hundred forty-nine".