2139446249 has 2 divisors, whose sum is σ = 2139446250. Its totient is φ = 2139446248.

The previous prime is 2139446237. The next prime is 2139446273. The reversal of 2139446249 is 9426449312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1900960000 + 238486249 = 43600^2 + 15443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2139446249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2139446219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069723124 + 1069723125.

It is an arithmetic number, because the mean of its divisors is an integer number (1069723125).

Almost surely, 2^2139446249 is an apocalyptic number.

It is an amenable number.

2139446249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139446249 is an equidigital number, since it uses as much as digits as its factorization.

2139446249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 44.

The square root of 2139446249 is about 46254.1484517875. The cubic root of 2139446249 is about 1288.5475809180.

The spelling of 2139446249 in words is "two billion, one hundred thirty-nine million, four hundred forty-six thousand, two hundred forty-nine".