9977634 has 32 divisors (see below), whose sum is σ = 22693440. Its totient is φ = 3247776.

The previous prime is 9977633. The next prime is 9977651. The reversal of 9977634 is 4367799.

9977634 is a `hidden beast` number, since 9 + 9 + 7 + 7 + 634 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9977634.

It is not an unprimeable number, because it can be changed into a prime (9977633) 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, 174 + ... + 4470.

It is an arithmetic number, because the mean of its divisors is an integer number (709170).

Almost surely, 2^9977634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9977634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11346720).

9977634 is an abundant number, since it is smaller than the sum of its proper divisors (12715806).

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

9977634 is a wasteful number, since it uses less digits than its factorization.

9977634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351 (or 4345 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 9977634 is about 3158.7393054825. The cubic root of 9977634 is about 215.2827288188.

The spelling of 9977634 in words is "nine million, nine hundred seventy-seven thousand, six hundred thirty-four".