1949389147 has 2 divisors, whose sum is σ = 1949389148. Its totient is φ = 1949389146.

The previous prime is 1949389111. The next prime is 1949389159. The reversal of 1949389147 is 7419839491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1949389147 - 2¹⁹ = 1948864859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1949389447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974694573 + 974694574.

It is an arithmetic number, because the mean of its divisors is an integer number (974694574).

Almost surely, 2^1949389147 is an apocalyptic number.

1949389147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949389147 is an equidigital number, since it uses as much as digits as its factorization.

1949389147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 1949389147 is about 44151.8872416571. The cubic root of 1949389147 is about 1249.2025093418.

The spelling of 1949389147 in words is "one billion, nine hundred forty-nine million, three hundred eighty-nine thousand, one hundred forty-seven".