1949743099 has 2 divisors, whose sum is σ = 1949743100. Its totient is φ = 1949743098.

The previous prime is 1949743031. The next prime is 1949743111. The reversal of 1949743099 is 9903479491.

It is a strong prime.

It is an emirp because it is prime and its reverse (9903479491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1949743099 - 2¹⁹ = 1949218811 is a prime.

It is not a weakly prime, because it can be changed into another prime (1949743699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974871549 + 974871550.

It is an arithmetic number, because the mean of its divisors is an integer number (974871550).

Almost surely, 2^1949743099 is an apocalyptic number.

1949743099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949743099 is an equidigital number, since it uses as much as digits as its factorization.

1949743099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The square root of 1949743099 is about 44155.8954048041. The cubic root of 1949743099 is about 1249.2781109679.

The spelling of 1949743099 in words is "one billion, nine hundred forty-nine million, seven hundred forty-three thousand, ninety-nine".