9979782 has 16 divisors (see below), whose sum is σ = 21133872. Its totient is φ = 3130880.

The previous prime is 9979777. The next prime is 9979789. The reversal of 9979782 is 2879799.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48819 + ... + 49022.

It is an arithmetic number, because the mean of its divisors is an integer number (1320867).

Almost surely, 2^9979782 is an apocalyptic number.

9979782 is an abundant number, since it is smaller than the sum of its proper divisors (11154090).

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

9979782 is a wasteful number, since it uses less digits than its factorization.

9979782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97863.

The product of its digits is 571536, while the sum is 51.

The square root of 9979782 is about 3159.0792962507. The cubic root of 9979782 is about 215.2981765065.

The spelling of 9979782 in words is "nine million, nine hundred seventy-nine thousand, seven hundred eighty-two".