1948549939 has 4 divisors (see below), whose sum is σ = 2226914224. Its totient is φ = 1670185656.

The previous prime is 1948549927. The next prime is 1948549957. The reversal of 1948549939 is 9399458491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1948549939 - 2¹¹ = 1948547891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1948549909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139182132 + ... + 139182145.

It is an arithmetic number, because the mean of its divisors is an integer number (556728556).

Almost surely, 2^1948549939 is an apocalyptic number.

1948549939 is a deficient number, since it is larger than the sum of its proper divisors (278364285).

1948549939 is an equidigital number, since it uses as much as digits as its factorization.

1948549939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278364284.

The product of its digits is 12597120, while the sum is 61.

The square root of 1948549939 is about 44142.3825704957. The cubic root of 1948549939 is about 1249.0232239123.

The spelling of 1948549939 in words is "one billion, nine hundred forty-eight million, five hundred forty-nine thousand, nine hundred thirty-nine".