1949337409 has 2 divisors, whose sum is σ = 1949337410. Its totient is φ = 1949337408.

The previous prime is 1949337407. The next prime is 1949337421. The reversal of 1949337409 is 9047339491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1933536784 + 15800625 = 43972^2 + 3975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1949337409 - 2¹ = 1949337407 is a prime.

Together with 1949337407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1949337407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974668704 + 974668705.

It is an arithmetic number, because the mean of its divisors is an integer number (974668705).

Almost surely, 2^1949337409 is an apocalyptic number.

It is an amenable number.

1949337409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949337409 is an equidigital number, since it uses as much as digits as its factorization.

1949337409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 1949337409 is about 44151.3013284999. The cubic root of 1949337409 is about 1249.1914577069.

The spelling of 1949337409 in words is "one billion, nine hundred forty-nine million, three hundred thirty-seven thousand, four hundred nine".