9781948 has 12 divisors (see below), whose sum is σ = 18674712. Its totient is φ = 4446320.

The previous prime is 9781943. The next prime is 9781963. The reversal of 9781948 is 8491879.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 9781898 and 9781907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9781943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111115 + ... + 111202.

It is an arithmetic number, because the mean of its divisors is an integer number (1556226).

Almost surely, 2^9781948 is an apocalyptic number.

It is an amenable number.

9781948 is a deficient number, since it is larger than the sum of its proper divisors (8892764).

9781948 is a wasteful number, since it uses less digits than its factorization.

9781948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222332 (or 222330 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 9781948 is about 3127.6105895715. The cubic root of 9781948 is about 213.8660179764.

It can be divided in two parts, 978 and 1948, that added together give a triangular number (2926 = T₇₆).

The spelling of 9781948 in words is "nine million, seven hundred eighty-one thousand, nine hundred forty-eight".