9777942 has 32 divisors (see below), whose sum is σ = 22239360. Its totient is φ = 3182760.

The previous prime is 9777923. The next prime is 9777949. The reversal of 9777942 is 2497779.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9777949) 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 15 ways as a sum of consecutive naturals, for example, 217 + ... + 4427.

It is an arithmetic number, because the mean of its divisors is an integer number (694980).

Almost surely, 2^9777942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9777942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11119680).

9777942 is an abundant number, since it is smaller than the sum of its proper divisors (12461418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9777942 is a wasteful number, since it uses less digits than its factorization.

9777942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4265 (or 4259 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 9777942 is about 3126.9700989936. The cubic root of 9777942 is about 213.8368191485.

The spelling of 9777942 in words is "nine million, seven hundred seventy-seven thousand, nine hundred forty-two".