1948209849 has 12 divisors (see below), whose sum is σ = 2904858112. Its totient is φ = 1256909400.

The previous prime is 1948209839. The next prime is 1948209863. The reversal of 1948209849 is 9489028491.

It is not a de Polignac number, because 1948209849 - 2⁷ = 1948209721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1948209795 and 1948209804.

It is not an unprimeable number, because it can be changed into a prime (1948209839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3491137 + ... + 3491694.

Almost surely, 2^1948209849 is an apocalyptic number.

It is an amenable number.

1948209849 is a deficient number, since it is larger than the sum of its proper divisors (956648263).

1948209849 is a wasteful number, since it uses less digits than its factorization.

1948209849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6982868 (or 6982865 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 1948209849 is about 44138.5302088776. The cubic root of 1948209849 is about 1248.9505536298.

The spelling of 1948209849 in words is "one billion, nine hundred forty-eight million, two hundred nine thousand, eight hundred forty-nine".