9977646 has 16 divisors (see below), whose sum is σ = 22806144. Its totient is φ = 2850744.

The previous prime is 9977633. The next prime is 9977651. The reversal of 9977646 is 6467799.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9977595 and 9977604.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 118740 + ... + 118823.

It is an arithmetic number, because the mean of its divisors is an integer number (1425384).

Almost surely, 2^9977646 is an apocalyptic number.

9977646 is an abundant number, since it is smaller than the sum of its proper divisors (12828498).

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

9977646 is a wasteful number, since it uses less digits than its factorization.

9977646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237575.

The product of its digits is 571536, while the sum is 48.

The square root of 9977646 is about 3158.7412049739. The cubic root of 9977646 is about 215.2828151249.

The spelling of 9977646 in words is "nine million, nine hundred seventy-seven thousand, six hundred forty-six".